" Secondary School Mathematics for Class "9

Senior Secondary School Mathematics for Class 11 ST-18is the set of all real numbers and Q is the set of all rational numbers then what is the set (RQ) ?

As an upper primary school Mathematics teacher you believe that

The enrolment of a secondary school in different classes is given below : Class VI VII VIII IX X Enrolment 600 500 400 700 200. Draw a pie chart to represent the above data.

There are 11 teachers who teach Mathematics or Physics in a school, Of these, 7 teach Mathematics and 3 teach both Mathematics and Physics. How many teach Physics?

There are 11 teachers who teach Mathematics or Physics in a school, Of these, 7 teach Mathematics and 3 teach both Mathematics and Physics. How many teach Physics?

In a school there are 20 teachers who teach Mathematics or Physics. Of these, 12 teach Mathematics and 4 teach both Physics and Mathematics. How many teachers teach Physics?

In a school there are 20 teachers who teach Mathematics or Physics. Of these, 12 teach Mathematics and 4 teach Physics and Mathematics. How many teach Physics?