Given that 10% of A’s income = 15% of B's income = 20% of C's income. If sum of their income is Rs.7800,then B’s income is:

Rs.2400

. 10% of A = 15% of B
= 20% of C
 10A = 15B = 20C

A : B : C = 6 : 4 : 3
 6x + 4x + 3x = 7800
 13 x = 7800

x= $\frac{7800}{13}$ = 600

B’s income = 4x
= 600 × 4 = 2400

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