In a class of 36 pupils, 1/3 are girls, how many are boys?
(2/3) * 36 = ?
108
12
To find the number of boys in a class of 36 pupils when 1/3 are girls, we need to subtract the number of girls from the total number of pupils.
First, we need to find the number of girls. The fraction 1/3 represents the proportion of girls in the class. To determine this, we divide the total number of pupils (36) by the denominator of the fraction (3) and then multiply it by the numerator (1).
Number of girls = (Total number of pupils) * (Numerator / Denominator)
= 36 * (1/3)
= 12
Thus, there are 12 girls in the class.
Now, to find the number of boys, we subtract the number of girls from the total number of pupils.
Number of boys = Total number of pupils - Number of girls
= 36 - 12
= 24
Therefore, there are 24 boys in the class.