In a standard deck of 52 playing cards, 13 cards are clubs, and 3 of the clubs are "face" cards (K, Q, J). What is the probability of drawing one card that is:


A) A club or a face card? Is this event a union or an intersection?


B) A club and a face card? Is this event a union or an intersection?


C) Not a club and not a face card?

Answers

Answer 1

A) This event is a union. If a card is of the suit of clubs or a face card or both, then it belongs to the set of "cards with clubs or a face".

For the probability in question, we use the inclusion/exclusion principle:

P(club or face) = P(club) + P(face) - P(club and face)

That is, we add the probabilities of drawing a club and of drawing a face card, and subtract the probability of both conditions being met because, in a certain sense, we've double-counted the event of the card being both of clubs and a face. The sets "club" and "face" are not disjoint; there is overlap between them.

Then we have

P(club) = 13/52

P(face) = 12/52

P(club and face) = 3/52

so that

P(club or face) = 13/52 + 12/52 - 3/52 = 22/52 = 11/26

B) This event is an intersection. If a card is of the suit of clubs and a face card, then it belongs to both the set of clubs and the set of face cards.

We already found the probability of the intersection above:

P(club and face) = 3/52

C) If a given card is not a club and not a face card, this is the same as saying the card is neither a club nor a face card. In other words,

P(not club and not face) = P(not(club or face))

and this probability is complementary to the probability that a card is either a club or face, which is to say

P(not(club or face)) = 1 - P(club or face)

Using the result from part (A), we have

P(not club and not face) = 1 - 11/26 = (26 - 11)/26 = 15/26


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Answer:

x+2x+2=17

Step-by-step explanation:

I'm assuming that's what you're asking, so here is the answer explanation.

3x+6=21

3x=15

Hence, x=5

Apply x=5 to x+2x=2

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solve pls brainliest

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NO BOTSSSS PLEASEEEE
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Answer:

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Step-by-step explanation:

Answer:

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Hence the solution to the given expression is -15/4

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Step-by-step explanation:

thats the answer because it says per means to multiply so i'd multipled 18x 30%

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Answers

Answer:

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PLS HELP FAST FIRST ANSWER GETS BRAINLYEST 35 POINTSSSSS

Elena borrowed some
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DUDE PUT THE GRAPH WHERE IS iT

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Step-by-step explanation:

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Step-by-step explanation

Fastest way to do it A=2(wl+hl+hw)=2·(5·2+8·2+8·5)=132

Answer:

132 [tex]cm^{2}[/tex]

Step-by-step explanation:

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Step-by-step explanation:

#20 i
Find the coordinates of the midpoint of the line segment with the endpoints R(-5, -7) and
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Step-by-step explanation:

3. Write three ratios equal to 4/36

Answers

[tex]{\Huge{\boxed{\mathbb{QUESTION}}}[/tex]

Write three ratios equal to [tex]\frac{4}{36}[/tex]

[tex]{\huge{\boxed{\mathbb{EXPLANATION\:WITH\:REASONING\;}}}[/tex]

This ratio can be represented as [tex]4:36[/tex]

_______________________________

[tex]{\Huge{\boxed{\mathbb{THE\:RATIOS}}}[/tex]

_______________________________

[tex]1:9[/tex] [tex]2:18[/tex] [tex]3:27[/tex]

_______________________________

[tex]{\huge{\boxed{\mathbb{TERMS}}}[/tex]

Equivalent/Equal ratios - Definition of Equivalent Ratio A ratio can be represented as a fraction. The concept of an equivalent ratio is similar to the concept of equivalent fractions. A ratio that we get either by multiplying or dividing by the same number, other than zero, to the antecedent and the consequent of a ratio is called an equivalent ratio.

35 is 25% of what percent​

Answers

Answer:

140

Step-by-step explanation:

35 ÷25%

35 ÷ 25/100

140

ok I am a little confused here but I think I may know what your asking.

What is 25% of 35? or you could be asking 35 is 25% of what number?

I'll answer both just in case.

What is 25% of 35?: 35 ÷ 4 = 8.75%

35 is 25% of what number?: 35 x 4 = 140

i need help! ill give brainliest

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Answer:

They are both correct

Step-by-step explanation:

Both options mean the same thing and will give the same answer

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12

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short way 6✓2 . ✓2 it is the 45 degree formula

Answer:

12

Step-by-step explanation:

The figure is an equilateral righ triangle - or if you prefer, it's half a square.

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