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In a class of 55 students, the number of students studying different subjects are 23 in Mathematics, 24 in Physics, 19 in Chemistry, 12 in Mathematics and Physics, 9 in Mathematics and Chemistry, 7 in Physics and Chemistry and 4 in all the three subjects. Find the number of students who have taken exactly one subject.

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In a class of 75 students, the number of students studying different Subjects are 43 in Mathematics 44 in Physics, 39 in Chemistry, 32 in Mathematics and Physics, 29 in Mathematics and Chemistry 27 in Physics and Chemistry and 24 in all three subjects. The number of students who have taken exactly one subject is

In a class of 55 students the number of students studying subjects are , 23 iin Mathematics 24.in physics 19in chemisty 12 in Mathematics and physics ,9 in Mathematics and chemistry ,7 in physics and chemistry and 4 in all the three subjects. the number of students who have taken ecactly one subject is

In a class,the number of students studying different subjects are 23 in Mathematics,24 in Physics,19 in Chemistry,12 in Mathematics and Physics,9 in Mathematics and Chemistry,7 in Physics and Chemistry and 4 in all the three subjects.The number of students who have taken exactly one subject is

Thirty children were asked about the number of hours they watched TV programmes in the previous week. The results were found as follows: 1 6 2 3 5 12 5 8 4 8 10 3 4 12 2 8 15 1 17 6 3 2 8 5 9 6 8 7 14 12 (i) Make a grouped frequency distribution table for this data, taking class width 5 and one of the class intervals as 5 - 10. (ii) How many children watched television for 15 or more hours a week?