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Mary has 15 coins in her piggy bank. Two are half-dollars, 5 are quarters, 7 are dimes and 1 is a nickel. What is the probability that when she shakes the piggy bank a half-dollar and then a dime fall out?

Respuesta :

calculista

Answer:

The probability is 1/15 or 6.67%

Step-by-step explanation:

step 1

Find the probability that when she shakes the piggy bank a half-dollar fall out

P=2/15

step 2

Find the probability that when she shakes the piggy bank a dime fall out

P=7/14

step 3

Find he probability that when she shakes the piggy bank a half-dollar and then a dime fall out

P=(2/15)(7/14)=1/15

Convert to percentage

(1/15)*100=6.67%

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