There are 7 boys in a class of 20. Find the number of way...
There are 7 boys in a class of 20. Find the number of ways of selecting 3 girls and 2 boys
1638
2730
6006
7520
Correct answer is C
No of boys in the class = 7; Girls = 20-7 = 13
No of selection = 13C3×7C2=13!(13−3)!3!×7!(7−2)!2!
= 286×21=6006
The table shows the distribution of the distance (in km) covered by 40 hunters while hunting. Wha...
Solve: 4sin2θ + 1 = 2, where 0º < θ < 180º...
Express 23−√7 in the forma+√b, where a and b are integers....
Given that 8x+mx2−3x−4≡5x+1+3x−4...
A body is acted upon by two forces F_{1} = (5 N, 060°) and F_{2} = (10 N, 180°). Fin...
Given that r = 3i + 4j and t = -5i + 12j, find the acute angle between them....
Simplify \frac{\log_{5} 8}{\log_{5} \sqrt{8}}....
If x = i - 3j and y = 6i + j, calculate the angle between x and y...