P(boy if favorite activity is swimming)
0.47
p(girl if favorite activity is sports)
0.26
p(girl if favorite activity is reading)
0.67
p(boy if favorite activity is sports)
0.74
p(favorite activity is swimming if a girl)
p(favorite activity is reading if a boy)
p(favorite activity is swimming if a boy)
p(favorite activity is reading if a girl)

Given the probabilities listed above, we are asked for the following:
P(Favorite activity is swimming if a girl)
P(Favorite activity is reading if a boy)
P(Favorite activity is swimming if a boy)
P(Favorite activity is reading if a girl)

So,
P(Favorite activity is swimming if a girl) = 1 - 0.47 = 0.53
P(Favorite activity is reading if a boy) = 1 - 0.67 = 0.33
P(Favorite activity is swimming if a boy) = 0.47
P(Favorite activity is reading if a girl) = 0.67

Dbecause there are negatives surrounding ding it