Recent questions in 2021

+2 votes

1 answer 704 views

There are 6 batsmen, 7 bowlers and 2 wickets keepers. Find the number of ways of forming

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

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0 answers 781 views

If vector a,b,c are three mutually perpendicular vectors equally inclined to vector a + b + c at angle θ, then find the value of 36 cos^2 2θ.

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

0 votes

0 answers 513 views

The mean of 6 numbers is 6.5 and its variance is 10.25. If 4 numbers are 2,4,5 and 7, then find the other two.

asked Aug 1, 2021 in 2021 by Doubtly (98.9k points)

0 votes

1 answer 590 views

which of the following is most easily economically refined by fractional distillation

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

+1 vote

1 answer 855 views

If P4O10 + HNO3 are mixed in 1:4 ratio , then nature of nitrogen oxide obtained will be

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

0 votes

0 answers 395 views

Benzene has vapor pressure of 70 torr and methyl benzene has 20 torr .

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

0 votes

1 answer 377 views

In △ABC , cos B= 3/5 , AB=5 and R=5 . find the area of △ABC

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

+1 vote

1 answer 1.2k views

find the coefficient of x^256 in [1-x]^101 x (x^2+x+1)^100

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

0 votes

1 answer 898 views

tangent and normal are drawn to y^2=2x at A(2,2). tangent cuts x-axix at T and normal cuts parabola again at P

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

0 votes

1 answer 459 views

Bird is flying in northeast direction with v 4rt^2 wind from north to south with 1m/s find the

asked Jul 20, 2021 in 2021 by Doubtly (98.9k points)

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