Question

Sachin wrote a total of six tests. his average mark in those was 65. his average mark in the first five tests was 60. find his mark in the sixth test..

Answer 1

in sixth test it is 55

Answer 2

Answer:

90

Step-by-step explanation:

Sachin wrote a total of six tests. his average mark in those was 65.

$Average = \frac{\text{Sum of all marks}}{\text{No. of test }}$

$65= \frac{\text{Sum of all marks}}{6}$

$65 \times 6= \text{Sum of all marks}$

$390= \text{Sum of all marks}$

Sum of marks of six tests = 390

His average mark in the first five tests was 60.

$60= \frac{\text{Sum of all marks}}{5}$

$60 \times 5= \text{Sum of all marks}$

$300= \text{Sum of all marks}$

Sum of marks of first 5 tests = 300

So, marks in 6th test = 390-300 = 90

Hence his mark in the sixth test is 90