Calculation Example | MCQs

Explanation

Let's calculate:

F7 = 12

H12 = 30

Formula: F7 * H12 = 12 * 30 = 360

Explanation

7*70 = 490 kg - total weight of 7 people

80 - 60 = 20 kg less

(490 -20)/7 ≈ 67.14 kg - new average weight ANSWER

Explanation

To find the median, first, we need to arrange the numbers in ascending order:

1, 5, 5, 5, 7, 8, 8, 9, 9, 10, 10

There are 11 numbers in total. Since there is an odd number of values, the median will be the middle number, which is 8.

However, if you're asking about the given options (5, 7, 8, 9), they are actually the values less than or equal to the median, not the median itself. So, the correct explanation would be:

The median of the given set is 8 because when arranged in ascending order, the middle value is 8.

Explanation

Given the total number of schools is 85:

Step 1: Calculate the number of schools completed.

Number of schools completed = 3/5 × 85

= 3 × 17

= 51

Explanation

To find the books sold in the 4th week:

Total books = 4320

Total angle in pie chart = 360°

Books sold in 4th week = 42/360 × 4320

= 4320 × 42/360

= 4320 × 7/60

= 504

Explanation

Let the younger sister's present age be x.

Fareeha's present age = x + 4

After 10 years:

Younger sister's age = x + 10

Fareeha's age = x + 4 + 10 = x + 14

Given:

x + 10 + x + 14 = 48

2x + 24 = 48

2x = 24

x = 12

Fareeha's present age = x + 4

= 12 + 4

= 16 years

Explanation

Given ratio: 5:7

To decrease 91 in the ratio 5:7, let's calculate the new value:

New value = 91 × 5/7

= 65

Explanation

Original cost price = 100

Original selling price = 100 + 320% of 100 = 420

New cost price = 100 + 25% of 100 = 125

Since the selling price remains constant, the profit is:

Profit = Selling price - New cost price = 420 - 125 = 295

Percentage of selling price that is profit:

(295 / 420) * 100% ≈ 70%

So, the correct answer is 70%.

Explanation

The average marks of four subjects is 120, so the total marks are:

120 x 4 = 480

If 33 was misread as 13, that means the actual total marks should be:

480 - 13 + 33 = 500

Now, let's calculate the correct average:

Correct average = Total marks / Number of subjects

= 500 / 4

= 125

Explanation

Total cartons = 5 + 8 = 13

Total cost = 105 + 155 = 260

Total items = 13 x 5 = 65

Average price per item = Total cost / Total items = 260 / 65 = 4