The sum of 1+2+3+4+5+..........+48+49+50is
a)1100
b)1235
c)1725
d)1275
Feraligatr:
???
Answers
Answered by
2
Sum of first n no.s = n(n+1)/2
n = 50
Sum = 50(51)/2
= 1275
Answer = d)1275
Hope this helps! :)
By substituting n = 50 in the formula,we get the answer 1275
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Answered by
1
Hi Ho !!
We may apply the formula :-
n × (n+1) / 2
So,
50 × (50+1) / 2
= 50 × 51 / 2
= 2550 / 2
= 1275
Therefore, 1 + 2 + 3 + ........ (50 times) = 1275.
Thanks....
We may apply the formula :-
n × (n+1) / 2
So,
50 × (50+1) / 2
= 50 × 51 / 2
= 2550 / 2
= 1275
Therefore, 1 + 2 + 3 + ........ (50 times) = 1275.
Thanks....
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