Question

A batsman has averaged 42 runs in the first four Tests. How many runs will he have to score in the 5th Test if he wants to average 50 in a five - Test series?​

Answer 1

Answer:

82 runs

Step-by-step explanation:

let the number of runs scored in 5th test be x.

$\frac{42 \ + 42 + 42 + 42 + x}{5} = 50 \\ \frac{168 + x}{5} = 50 \\ 168 + x = 50 \times 5 \\ 168 + x = 250 \\ x = 250 - 168 \\ x = 82$

step 1: add all the integers

step 2: transfer 5 (denominator) on other side

step 3: simplify

step 4: take 168 on other side

step 5: simplify and solve