A student has a penny, nickel, dime, and quarter distributed two coins apiece to his front two pants pockets. What is the probability that the front right pocket has more then 30 cents in it?

1 answer

To have more than 30 cents, the right pocket must have the quarter and the dime.

possible cases, order does not matter:

L --- left pocket, R -- right pocket

L -- R

QP ND
QN PD
QD PN

PN QD
PD QN

ND QP -----> so we have 6 cases

prob = 1/6