Find the difference between the average of prime numbers between 40 and 70 and…
2026
Find the difference between the average of prime numbers between 40 and 70 and the average of multiples of 2 between 10 and 60.
- A.
20
- B.
13
- C.
26
- D.
18
Attempted by 55 students.
Show answer & explanation
Correct answer: D
Prime numbers between 40 and 70: 41, 43, 47, 53, 59, 61, 67.
Sum of these primes: 41 + 43 + 47 + 53 + 59 + 61 + 67 = 371.
Average of these primes: 371 / 7 = 53.
Multiples of 2 between 10 and 60: 12, 14, ..., 58. This is an arithmetic progression.
Average of multiples of 2: (First term + Last term) / 2 = (12 + 58) / 2 = 70 / 2 = 35.
Difference between averages: 53 - 35 = 18.
Final Answer: Option 4