Question

average rainfall for 3 year is 65% the rainfall for first year is 62 and60 for second year find the rainfall for third year

Answer 1

Let for third year rainfall be x,
Then,

$65 = \frac{60 + 62 + x}{3}$

$(65)(3) = 60 + 62 + x$

$195 = 122 + x$

$x = 73$