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Andrei [34K]
3 years ago
8

Kieran’s wallet contains 7 bills: three $5 bills, two $10 bills, one $20 bill, and one $100 bill. If Kieran pulls out two bills

at random, what is the probability that he selects exactly two $5 bills?
Use complete sentences to explain the probability. In your final answer, include all of your calculations.
Mathematics
2 answers:
Vladimir79 [104]3 years ago
8 0
3/7
3 \div 7
Setler79 [48]3 years ago
3 0

Answer:

The answer is 1/7.

Step-by-step explanation:

So, basically, 7 bills, and there is a 3/7 chance to collect 1. Another 1/3 to collect another one, which is actually 1/7.

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The probability distribution for a random variable x is given in the table X: -5,-3,-2,0,2,3 Probability: .17,.13,.33,.16,.11,.1
Ivan

Answer:

0.6 probability that -2 \leq x \leq 2

Step-by-step explanation:

The probability distribution is given in the table.

Probability that x is between -2 and 2.

Between -2 and 2, inclusive, we have -2, 0 and 2. So

P(-2 \leq x \leq 2) = P(X = -2) + P(X = 0) + P(X = 2)

From the table:

P(X = -2) = 0.33, P(X = 0) = 0.16, P(X = 2) = 0.11. So

P(-2 \leq x \leq 2) = P(X = -2) + P(X = 0) + P(X = 2) = 0.33 + 0.16 + 0.11 = 0.60

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