Question

Average of 13 number is 52. average of first 7 number is 51. average of last 7 number is 54. find the 7th number.

Answer 1

Answer:

13 AVG 52 =(13×52) = 676

7 AVG 51 = ( 7×51) = 357

7 AVG 54 = (7×54) = 378

1ST AVG + 2ND AVG -TOTAL AVG

357+378-676=59