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The given bar graph represents the pass percentage of 10th and 12th classes of a school during the consecutive four year period 2016-2019. What is the average percentage of the failed students of the 12th class for all four years?

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

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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.

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

Q.N. 45 In a survey of 25 students ,it was found that 15 had taken mathematics , 12 had taken physics and 11 had taken chemistry ,5 had taken mathematics and chemistry, 9 had taken mathematics and physics, 4 had taken physics and chemistry and 3 had taken all the three subjects. write the number of student that had taken (a) at least one of three subjects (b) only mathematics

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