Question

A jar of coins contains 8 pennies, 5 nickels, 12 dimes, 7 quarters. you choose a coin at random, do not replace it, and then choose another coin. what is probability of choosing a dime first and quarter second

Answer 1

$|\Omega|=32\cdot31=992\\ |A|=12\cdot7=84\\\\ P(A)=\dfrac{84}{992}=\dfrac{21}{248}\approx8.5\%$