Given in question,
x + y = 18
By using algebraic formula
? x2 + y2 = (x + y)2 - 2xy
Put the value of x + y and xy as per given question,
? x2 + y2 = (18)2 - 2 x 72
? x2 + y2 = 324 - 144
? x2 + y2 = 180
U ? A = {a, b, c, d, e, f} ? {a, b, c} = {a, b, c, d, e, f} = U
(U ? A)? = ?.
Sunil's income is less than Mukul's = [(10 / (100 + 10)] × 100 %
= ( 1000 / 110 )%
= 9.09 %
So, 39 is wrong.
So, 33 is wrong. It must be 35
∴ x = 7.
So, 40 is wrong.
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