Answer:
Step-by-step explanation:
Sum of interior angles of a polygon formula:

n represents the n-sided polygon

There are 10 in total
3/10 x 2/9 = 6/90
Reduce
1/15
1/15 is the chance of that happening
multiply the 3 by how ever much to get 150
there will be 50 apples
D; 1 and 6 are being added together first then divided by 7, so need the parentheses around 1 and 6