Answer:
87 hits
Step-by-step explanation:
a = 
Where,
a is the batting average
h is the number of hits
n is the number of times at bat
Given;
a = 0.290
n = 300 times
Finding h;
0.290 = 
h = 0.290 × 300 = 87 hits
8/14 , 12/21, 16/28, 20/35
To find the mean, you add up all the numbers and divide by the number of numbers in the sequence
28+42+56+70+84+98+112
=490 divide by 7
=70