{753 \times753 \times247\times 247 \times753 \times247}/ {753\times 753\times 753 \times247\times 247 \times247} ?

SSC CHSL Model Paper 4

Question : 59 of 100

Marks: +1, -0

{753 ×753 ×247× 247 ×753 ×247}/ {753× 753× 753 ×247× 247 ×247}

Solution:

{753 ×753 ×247× 247 ×753 ×247}/ {753× 753× 753 ×247× 247 ×247}

= ?

Let 753 = a and 247 = b
Then the equation is =

{a^2+b^2- ab}/{a^3+b^3}

={a^2+b^2- ab}/{(a+b)(a^2+b^2-ab)}

=1/{a+b}

=1/{753 +247}

= 1/ 1000

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