Question

The sum of k number is 2000 and their average is 50 . If 91 is included into the list then the new average is

Answer 1

AVERAGE IS 50

NO. ARE K

AND SUM IS 2000

SO,

WE CAN SAY THAT.....

50K= 2000

K= 2000/50

K= 40

SO THERE ARE 40 NO.....

NOW 91 SHOULD BE ADDED TO THE SUM ....

IT WILL BE 2000+91= 2091

NOW ONE NO IS ADDED SO TOTAL NO. WILL BE 40+1= 41

SO FOR GETTING THE AVERAGE......

DIVIDE 2091 BY 41

AND IT WILL BE 51......

SO THE NEW AVERAGE WILL BE 51