Question

in a class of 38 students 19 read buology 16 read chemistry and 5 were not allowed to read both subjectsillustrate the information on a venn diagramHow many students read Both biology and chemistryHow many read only chemistry Someone please waste a little time to help me with this :(

Answer 1

The total number of students in the class is 38.

Since there are 5 were not allowed to read both subjects.

Let x be the number of students who read both the subject.

$\begin{gathered} \text{Sum of student =38} \\ 19-x+x+16-x+5=38 \\ 40-x=38 \\ x=40-38 \\ x=2 \\ so,2\text{ students read both the subject.} \\ \text{The number of students who read only chemistry =16-x} \\ =16-2 \\ =14 \end{gathered}$