Question

Three friends went to a hotel and had breakfast to their taste, paying Rs.16,Rs.17 and Rs.21 respectively 1)find their mean expenditure 2)if they have spent 3 time's the amount that they have already spent,what would their mean expenditure be?

Answer 1

Answer:

Correct option is

A

(i) Rs : 18

(ii) Rs : 54

(iii) Rs: 9

(i)

Number of people =3

Total money spend on breakfast =Rs.(16+17+21)=Rs.54

Required mean =354=Rs.18

(ii)

Number of people =3

Total money spend on breakfast =Rs.(16+17+21)×3=Rs.162

Required mean =3162=Rs.54

(iii)

Number of people =3

Required mean =316×10050+17×10050+21×10050

                           =38+8.5+10.5

                           =327

                           =Rs.9