Question

The average of 7 numbers is 60.the average of the first three numbers is50,whilethe average of the last three is 70.What must be the remaining number

Answer 1

Answer:

60

Step-by-step explanation:

Sum of the numbers=

$7 \times 60 = 420$

sum of first three numbers=

$3 \times 50 = 150$

sum of last three numbers

$3 \times 70 = 210$

Remaining number is

$420 - 150 - 210 = 60$