There are 44 members in group A, 26 members in group B, and 45 members in group C. All the members of these groups went to a restaurant. The average amount spent on each member of group A, B, and C is ₹403, ₹383, and ₹228, respectively. The total average amount (in ₹) spent per member is:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e. 330.
Total members = 44 + 26 + 45 = 115
Total amount spent = (44 × 403) + (26 × 383) + (45 × 228)
⇒ 44 × 403 = 17732
⇒ 26 × 383 = 9958
⇒ 45 × 228 = 10260
Total amount = 17732 + 9958 + 10260 = 37950
Total average = 37950 ÷ 115 = 330