Question

28. If a : b = c:d, then (ma + nc): (mb + nd)
is equal to
(A) m:n
(B) na: mb
(C) a:b
(D) md: nc​

Answer 1

Answer:

a:b

Step-by-step explanation:

let a/b=c/d=x(say)

a=bx,c=dx.................2

now.

ma+nc/mb+nd=mbx+ndx/mb+nd

ise this and find above answer