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Maths-

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Easy

Question

A survey asked a class of 30 students how many siblings they have. The number of students who have one sibling is 3 times the number of students, n, who have two or more siblings. If 6 students have no siblings, which of the following equations represents this situation?

$\frac{1}{3} n + 6 = 30$
$3 n + 6 = 30$
$4 n + 6 = 30$
$6 n + 6 = 30$

The correct answer is: $4 n plus 6 equals 30$

Given the number of students who have two (or) more siblings is n. The number of students who have one sibling is 3 times the number of students who have two (or) more siblings = 3n
6 students has no siblings
Then total no. of students in class is = 6 + 3n + n = 30
⇒ 4n + 6 = 30 represents the situation.

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