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1. 19 people went to a hotel for combine dinner party 13 of them spent Rs. 79 each on their dinner and rest spent 4 more than the average expenditure of all the 19. What was the total money spent by them.
then,
19x = 13 × 79 + 6 × (x + 4)
or, 19x = 13 × 79 + 6x + 24
or, x = 80.84
So, total money spent
= 80.84 × 19
= Rs. 1536.07
Solution:
Let average expenditure of 19 people be xthen,
19x = 13 × 79 + 6 × (x + 4)
or, 19x = 13 × 79 + 6x + 24
or, x = 80.84
So, total money spent
= 80.84 × 19
= Rs. 1536.07