Question

Three friends went to a hotel and had breakfast to their taste, paying tim
respectively. Find their mean expenditure fi) If they have spent 3 times tem
hey have already spent, what would their mean expenditure be? (imele
eiers 50% discount, what would their mean expenditure be? (iv) Dove
relationship between the change in expenditure and the change in me​

Answer 1

Step-by-step explanation:

Let three friends be A, B and C

According to the question,

Expenditure of A =Rs.16

Expenditure of B =Rs.17

Expenditure of C =Rs.21

(i)

Their mean expenditure is,

=

3

16+17+21

=

3

54

=Rs. 18

(ii)

New expenditure of A =Rs.16×3=Rs. 48

New expenditure of B =Rs.17×3=Rs. 51

New expenditure of C =Rs.21×3=Rs. 63

Their new mean expenditure is,

=

3

48+51+63

=

3

162

=Rs. 54

(iii)

Total amount =Rs. 54

After discount net amount to be paid =54×

100

50

=Rs. 27

Their mean expenditure is,

=

3

27

=Rs. 9

(iv)

The change in the expenditure and the change in the mean expenditure are proportionate to each other.