`2:3::4:c`

If a/2=b/3=c/4, then a : b : c= (a) 2:3:4 (b) 4:3:2 (c) 3:2:4 (d) None of these

If a:b:c=2:3:4, then (1)/(a):(1)/(b):(1)/(c) is equal to (1)/(4):(1)/(3):(1)/(2) b.4:3:2 c.6:4:3 d.none of these

Simplify : (Use formulae) (2a-3b+4c)^2-(2a+3b-4c)^2

if (2a+3b+4c+5d)/(2a-3b-4c-5d)=(2a-3b+4c-5d)/(2a-3b-4c+5d) , then show that a,3b,2c and 5d are in proportion.

If a/2 = b/3 = c/4 = 2a-3b+4c/p, then find p .

Expand (2a-3b+4c) ^2

Expand (2a+3b+4c)^2 .

A random variable X has the following distribution. {:(x,1,2,3,4),(p(X=x),c,2c,3c,4c):} then the value of c is …………… .

A random variable X has the following distribution {:(x,1,2,3,4),(P(X=x),c,2c,3c,4c):} The value of c is

A random variable X ahs the following distribution {:(x,1,2,3,4),(P(X=x),c,2c,3c,4c):} The value of c is