Question 1158499
P(basketball) + P(softball) - P(basketball AND softball) = P(basketball OR softball)
<pr>
0.31 + 0.39 - P(basketball AND softball) = 0.50
<pr>
P(basketball AND softball) + 0.50 = 0.31 + 0.39
<pr>
P(basketball AND softball) + 0.50 = 0.70
<pr>
P(basketball AND softball) = 0.20