Question

11. The average of 20, 25 and 45 is 10 more than the
average of 25, 30 and x. Find the value of x.
B) 35 C) 25 D) 15 ES
A) 40

Answer 1

Step-by-step explanation:

avg of 20, 25 and 45=(20+25+45)÷3

avg=30

avg of 25,30 and x is 10 less than the avg calculated.

avg of 25, 30 and x = 20

20=(25+30+x)÷3

60=25+30+x

x=60-55

x=5