A is 120% of B and B is 65% of C. If the sum of A, B and C is 121.5, then te value of C-2B + A is:
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 24
A is 120% of B
B is 65% of C
The sum of A, B, and C = 121.5
According to the question -
Let C be 100x.
B is 65% of C = (65% of 100x) = (65/100 × 100x) = 65x
A is 120% of B = (120% of 65x) = (120/100 × 65x) = 78x
The sum of A, B and C = 121.5 = (78x + 65x + 100x)
243/2 = 243x
x = 1/2
The value of A = (78 × 1/2) = 39
The value of B = (65 × 1/2) = 65/2
The value of C = (100 × 1/2) = 50
C - 2B + A = 50 - 2(65/2) + 39 = 89 - 65 = 24