Question

Four quantities a,b,c and d are said to be in __________ if a:b = c:d , or = , this is also written as a:b:: c:d.​

Answer 1

Solution

verified

Verified by Toppr

Correct option is

C

21%

X=a

2

b

3

c

5/2

d

−2

Percentage error in X is

x

ΔX

×100=[2(

a

Δa

)+3(

b

Δb

)+

2

5

(

c

Δc

)+2(

d

Δd

)]×100

=2×1+3×2+

2

5

×2+2×4

=21%