Latest Wipro Aptitude Question SOLUTION: The average of first 50 natural numbers is : a. 12.25 b. 21.25 c. 25 d. 25.5

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The average of first 50 natural numbers is :

a. 12.25
b. 21.25
c. 25
d. 25.5

Asked In Wipro (12 years ago)

Unsolved Read Solution (7)

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Read Solution (7) :

Jaspalsingh Parmar  (9 years ago)

First 50 number means
from 1-50
sum of first 50 number wil be
=(50/2)(2*1+(50-1)*1)
=25*51
=1275

so average of the 50 number=1275/50= 25.5

Is this solution Helpfull? Yes (5) | No   

Reck  (12 years ago)

sum of first 50 natural no. is=50*(50+1)/2=25*51
avg is=25*51/50=26.50

Is this solution Helpfull? Yes (4) | No (8)  

VIDHYA RANI R  (8 years ago)

The average of 1st 50 natural numbers, Natural numbers starts with 1,2......
since we have to find 1st 50 numbers avg
hence n=50
50*(50+1)/2
50*(51)/2
25*(51) ->(cancellation between 2 and 50 hence 50 becomes 25)
1275
To fine the avg of 50 numbers
avg= sum of the numbers/total numbers
1275/50
25.50

Is this solution Helpfull? Yes (2) | No   

NEERAR JAYAN N S  (8 years ago)

the sum of n natural numbers is (n(n+1))/2
hence (50(51))/2 = 1275
to get the average 1275/50=25.5

Is this solution Helpfull? Yes | No   

rohit gupta  (6 years ago)

sum of first 50 natural no is 5050 and average is 1275/50 = 25.5

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anushadevi  (6 years ago)

The average of n natural numbers =n+1/2
=50+1/2
=51/2
=25.5

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Ranjeet Kumar  (6 years ago)

25.5
50*51/2/50

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