Question

21.
Roy's salary is 20% less than Joy's and 10% less than Troy's. If Troy's salary is Rs. 18000 then how much is
Joy's salary?
(a) Rs. 19800
(b) Rs.21600
(c) Rs. 15840
(d) Rs. 20250​

Answer 1

Answer:

(d) Rs. 20250​

Step-by-step explanation:

1. Roy's salary is 20% less than Joy's                => R = 4/5 J     ( 1 )

2. Roy's salary is 10% less than Troys's             => R = 9/10T    ( 2 )

3. Since it is given that Troy's salary is 18,000 => R = 9/10 * 18,000

                                                                        => R = 18,000*9/10 = 16,200

Roy's Salary is 16,200

Putting 16,200 in equation (1) (R = 4/5 J)

16,200 = 4/5 J

J = 16,200 * 5 / 4  => 20250

Joy's Salary is 20250

Answer 2

Answer:

Joy's salary is Rs.$20250$

Step-by-step explanation:

It is given that:

Roy's salary is $20$% less than Joy's salary.

Roy's salary is $10$% less than Troy's salary.

Troy's salary is Rs.$18000$.

We need to determine Joy's salary.

As per the given information,

Roy's salary = $0.9$*Troy's salary

$=0.9*18000$

$=16200$

Roy's salary = $0.8$* Joy's salary

$16200/0.8$

$=20250$

Joy's salary is Rs.$20250$

Option (d) is correct.

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