Explanation

Total people = 100

Pepsi drinkers = 50

Coke drinkers = 40

Both = 20

People drinking Pepsi or Coke = Pepsi + Coke - Both

= 50 + 40 - 20

= 70

People drinking neither = Total - People drinking Pepsi or Coke

= 100 - 70

= 30

Explanation

To find the number of pages Faraz read in 1 hour, divide the total number of pages by the total hours:

49.5 pages ÷ 11 hours = 4.5 pages/hour.

Explanation

Total number of apple trees = Number of rows × Number of trees per row

= 243 × 21

= 5103 trees.

Explanation

To solve the proportion:

x : 12 :: 3 : 4

We can set up an equation based on the ratio:

x/12 = 3/4

Cross-multiply:

4x = 3 * 12

4x = 36

Divide both sides by 4:

x = 36/4

x = 9

Explanation

Junaid starts with Rs. 600.

He gives one-fourth (1/4) to Awais:

Amount given to Awais = 600 * (1/4) = Rs. 150

Remaining amount = 600 - 150 = Rs. 450

He then gives half of the remaining amount to Hamza:

Amount given to Hamza = 450 * (1/2) = Rs. 225

Remaining amount = 450 - 225 = Rs. 225

The amount left with Junaid is:

Rs. 225