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0+1+2+3+.....+49=?0 + 1 + 2 + 3 + ..... + 49=?

A1250

B1225

C1200

D1275

Answer:

B. 1225

Read Explanation:

0+1+2+3+.....+490 + 1 + 2 + 3 + ..... + 49

ആദ്യത്തെ n അഖണ്ഡസംഖ്യകളുടെ തുക = n(n - 1)/2

=50(501)/2=50(50 - 1)/2

=50×492=\frac{50\times49}{2}

=1225=1225


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