The average daily income of 7 men, 11 women and 2 boys is Rs. 257.50. If the average daily income of the men is Rs.10 more than that of women and the average daily income of the women is Rs.10 more than that of boys, the average daily income of a man is
Options:
A . Rs. 257
B . Rs. 265
C . Rs. 250
D . Rs. 277.5
Answer: Option B Answer: (b)Average daily salary : Men ⇒ Rs. x (let). Women ⇒ Rs. (x – 10) Boys ⇒ Rs. (x – 20) According to the question, 7x + 11 (x – 10) + 2 (x – 20) = 20 × 257.5 ⇒ 7x + 11x – 110 + 2x – 40 = 5150 ⇒ 20x – 150 = 5150 ⇒ 20x = 5150 + 150 = 5300 ⇒ x = $5300/20$ = Rs. 265
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