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The correct answer is C
{(21/20) + (20/21)}2 - {(21/20) - (20/21)}2 = ?
If x + y + z = 20, x² + Y² + z² = 160 and x z = y², then find the value of x z?
If a3 + b3 = 6240 and a + b = 30, then find the value of {(a + b)2 – 3ab}
If a +`1/b` = 1 and b +`1/c` =1 , then the value of c +`1/a` is
In a college, the proportion of boys to girls is 7:9, and the proportion of graduate students to postgraduate students is 4:5. Determine the total numbe...
Find the value of ‘x’ in the given expression:
(49/16)x× (64/343)x-1 = 4/7
(a+2 )² + (b-5)² + (c+3)² = 0
Find the value of√ (a + b + c)?
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A train takes 25 seconds more to cross a 750 metres long platform than it does to cross a 350 metres long bridge. If the time tak...
A bag contains 6 red, 10 yellow, and 14 black balls. If 2 balls are picked at random without replacement, find the probability that the first ball is re...
