If x = 11 for two coins, they must be a penny and a dime.
P(dime) = 4/12
P(penny) = 2/11 because one coin already removed from jar.
X = 4/12 *2/11 = ?
A jar contains 2 pennies, 6 nickels and 4 dimes. A child selects 2 coins at random without replacement from the jar. Let X represent the amount in cents of the selected coins.
a. Find the probability X = 11.
b. Find the expected value of X
2 answers
A jar contains 7 pennies, 7 nickels and 4 dimes. A child selects 2 coins at random without replacement from the jar. Let X represent the amount in cents of the selected coins.