Explanation

To determine the fraction of boys in the history class when there are 12 boys and 18 girls,

we can follow these steps:

1. Calculate the total number of students in the class:

Total number of students = 12 boys + 18 girls = 30 students

2. Find the fraction of boys in the class:

Fraction of boys = Number of boys / Total number of students

= 12 boys / 30 students

= 2/5

Explanation

Explanation

120 men can do work = 30 days

1 man can do this work = 120 x 30 = 3600 days

80 men can do this work = 3600/80 = 45 days

Explanation

A man bought a flat for Rs.820,000. He borrowed 55% of this money from a bank. How much money did he borrow from the bank?

Total Amount = 820,000

Bought from Bank = 55%

               = 820,000 x 55/100

                               = 451,000

Explanation

Semi was 21 years old in 1945

The number of years from 1945 to 1965 is 20 years.

21 + 20 = 41

Explanation

Raza is ranked ninth from the top. That means there are 8 students above Raza.

Raza is 38th from the bottom. That means there are 37 students below him.

So total students 8 + Raza + 37 = 46 students

Explanation

Waking - 1/3 hours = 20 min

Motorbike ride = 1/2 hours = 30 min

Total journey = 20 + 30 = 50 min

Portion of Bike ride = 30/50 = 0.6

ND16-3-2023

Explanation

Total no. of students = Top position + Bottom position - 1

Total no. of  students =16+49−1

                                      = 64

****

Number of students in the class $=(15+1+48)=64$

Explanation

Explanation

Now Maryam was shifted to 4 places to the right.

This implies her place is x+4 from left now, but it is given that her new place is 12th from left.

Now, in a row of 21 girls, her place is 8,

which is 14th place from right.