Join 60,000+ competitive exam aspirants
or with email
Your Cart
SubtotalтВ╣0
TotalтВ╣0
Examoogle тАв User тАв info@examoogle.com тАв EE-2024-8821
Chapter 1 of 12 тАв Page 1 of 248ЁЯФТ Protected PDF тАв Watermarked
Join 60,000+ competitive exam aspirants
Calculate the mean of the first 5 prime numbers.
5.6
5.2
4.8
6.0
6
Since the sequence is small, sum the numbers by grouping (2+3+5=10 and 7+11=18) to get 28, then divide by 5 (which is equivalent to doubling the sum and dividing by 10).
The first 5 prime numbers.
Mean=nтИСi=1nтАЛxiтАЛтАЛ
Since the sequence is small, sum the numbers by grouping (2+3+5=10 and 7+11=18) to get 28, then divide by 5 (which is equivalent to doubling the sum and dividing by 10).
Many students incorrectly include 1 as a prime number, which is a composite/unit number, not a prime.
Identify the first 5 prime numbers
List the first 5 prime numbers starting from the smallest prime, which is 2.
2,3,5,7,11
Sum the prime numbers
Calculate the total sum of the identified prime numbers.
Sum=2+3+5+7+11=28
Calculate the mean
Divide the total sum by the count of numbers, which is n=5.
Mean=528тАЛ=5.6
A is correct because the sum of the first 5 prime numbers (2,3,5,7,11) is 28, and their mean is 28/5=5.6.
Understanding prime sequences is essential for probability and number series questions in reasoning sections.
Get instant step-by-step AI explanations, full shift Previous Year Papers (SSC GD, RRB, SSC JE), and regional rank analysis on the official Examoogle App.
Free Download тАв 100K+ Aspirants