Bob has 7 oranges, 10 plums and 4 pears in a bowl. he can choose: an orange and a plum or a plum and a pear or an orange, a plum and a pear. how many different ways can bob choose a fruit from the bowl?

In statistics the word "and" symbolized for multiplaction operation and the word "or" symbolized addition operation. so the number of ways can bob choose a fruit from the bowl is :

P = ( 7 x 10 ) + ( 10 x 4 ) + (4 x 7)
P = 138 ways he can choose a fruit from the bowl