Question

in a class with a certain number of students , if one student weighing 50kg is added then average weight of class incereases by 1 kg ,if one more student weighin 50kg is added then the average weight of class increasses by 1.5kg over the original average? what isthe original average weight (in kg) of the class?

Answer 1

option are.....4 46 2 47

Answer 2

a.4 b.46 c.2 d.47

Answer 3

we have ( Xi + 50 ) / ( n+1) = Xi / n

Answer 4

( Xi + 50 ) / ( n+1) = Xi / n + 1

Answer 5

how to do

Answer 6

its a long one, there might be a trick

Answer 7

15. Ralph likes 25 but not 24; he likes 400 but not 300; he likes 144 but not 145. Which does he like:
10 50 124 200 1600

Answer 8

well what abt.........
‎976 : 684
375 : 225
864 : 512
597 : ?

Answer 9

you have 2 equations with 2 variables : the initial average weight (Xi) and the initial number of people (n). The 2 equations are :
(Xi + 50) / (n+1) = Xi + 1
(Xi + 100) / (n+2) = Xi + 1.5

I'd isolate n and solve it from there

Answer 10

yea i got answer

Answer 11

its 47.