UPSC CAPF AC 2024 Paper 1 · Question 48

Question 48 of the UPSC CAPF (AC) 2024 Paper I (4 August 2024). Try it first, then open the answer and explanation.

1. CAPF 2024 · P-I · Q48 · General Mental Ability · Arithmetic

   Which one of the following is the average of first five multiples of each of the numbers from 11, 12, 13, ..., 20?

   1. 40.5
   2. 42.5
   3. 44.5
   4. 46.5

   निम्नलिखित में से कौन-सा, संख्या 11, 12, 13, ..., 20 में से प्रत्येक संख्या के पहले पांच गुणजों का औसत है?

   1. 40.5
   2. 42.5
   3. 44.5
   4. 46.5
   Show answer

   Answer: (4) 46.5

   उत्तर: (4) 46.5

   The first five multiples of n are n, 2n, 3n, 4n, 5n, whose average is 15n/5 = 3n. Averaging 3n over n = 11 to 20 gives 3 × 15.5 = 46.5.

Answer it in the practice appMake a topic-wise quiz