The average of 7 numbers is 50 . Average of first 3 is 40, average of last 3 is 60. What must be the remaining number?The average of 7 number is 50. avaerage of 1st 3 is 40, avg of last 3 is 60. what must be the remaining number?
Anonymous:
first 7 number's sum is 7*50 = 350
sum of first 3 numbers is 3*40=120............. sum of last 3 is 60*3=180
last number is 350-(120+180) ==>350-300 = 50
answer is 50
Answers
Answered by
1
Answer:
Answer is 250
Step-by-step explanjNation:
ans is 50
Answered by
23
Answer:
50
Step-by-step explanation:
The answer is 50.
Consider a,b,c,d,e,f,g are the seven numbers.
Given, (a+b+c+d+e+f+g)/7= 50 which is eqn1. , (a+b+c)/3=40 which means a+b+c=120, and (e+f+g)/3=60 which means e+f+g=180.
Using both the values in eqn1 we get 120+d+180=(50*7)
d+300=350 which implies d=50.
Similar questions