⇒ D₂ = 32

Let ages of P and Q after 2 years will be 5x years and 4x years respectively According to question

5x – 4x = 4

⇒ x = 4

Hence, the age of Q after 2 years = 4x = 4 × 4 = 16 years.

Let the income of B = Rs. 100x, then

the income of A = 100x + 20% of 100x = Rs. 120x

Total expenditure of A and B = 30% of (100x + 120x) = 66x

According to question

66x = 26400

⇒ x =  = 400

Hence, the income of B = 100x = 100 × 400 = Rs. 40000.

Let each of A and B invested Rs. 100 and the rate of interest = 1%, then

Simple interest of A = = t (SI = )

Simple interest of B =  = (t + 4) (SI = )

According to question

 =

⇒ t = 4

Let the required time = t seconds, then

72 × 30 = 54 × t (Distance = Speed × Time)

⇒ t = 40

Sum of the number of clothes dry cleaned by M on Tuesday and Wednesday = 75 + 95 = 170

Sum of the number of clothes dry cleaned by L on Wednesday and Thursday = 85 + 25 = 110

Required Ratio = 17 : 11

Hence, the answer is option A.

Sum of the number of clothes dry cleaned by O on Monday and Thursday = 40 + 115 = 155

Difference of the number of clothes cleaned by N on Monday and Wednesday = 100 – 35 = 65

Required difference = 155 – 65 = 90

Hence, the answer is option D.

Sum of the number of clothes dry cleaned by N on Tuesday, Wednesday and Thursday = 55 + 35 + 60 = 150

Clothes dry cleaned by O on all the days = 40 + 90 + 60 + 115 + 70 = 375

Required percentage = × 100 = 40 %

Hence, the answer is option B.

Total number of clothes dry cleaned by all the shops together on Monday = 50 + 80 + 100 + 40 = 270

Similarly, for all the days total number of clothes dry cleaned by all the shops is calculated and it is shown in the table below:

The most number of clothes were dry cleaned on Friday.

Hence, the answer is option E.

Number of clothes dry cleaned by L on all the days put together = 50 + 60 + 85 + 25 + 110 = 330

Similarly, for all the shops total number of clothes dry cleaned on all the days is calculated and it is shown in the table below: