Quote:
Originally Posted by mohsy
a cricketer has certain average for 9 innings. in the tenth inning, he scores 100 runs,thereby increasing his average by 8 runs. his new average is: ??  |
his avg increased by 8 runs means that when he scored 100 then according to 10th attempt he get 80 runs extra because these 80 runs in 10 attempts will increase avg by 8 runs and it also means that the remaining 20 runs he score out of 100 was just to maintain the old avg
so the old avg was 20 and the new one (20+8) is 28
another way
20*9=180 runs which he was scoring already
then 100 runs in 10th attempt added
so 180+100=280
now divide 280 on 10 to get new avg = 280/10 = 28