Study the histogram of marks (in Mathematics) distribution of 50 students of class IX and answer the following questions.
Percentage of students who have secured marks more than 59 is
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The number of students who have scored between 39 and 80 is
The average marks of the students are
The number of students who have secured marks less than 60 is
If θ is positive acute angle and 7cos2Ɵ + 3sin2Ɵ = 4, then the value of θ is
Two numbers are in the ratio 3:5. If 6 is added to both of them, the ratio becomes 2:3. The numbers are
The least number to be added to 13851 to get a number which is divisible by 87 is
If ( x - 5)2 + (y - 2)2 + (z - 9)2 = 0 , then value of (x + y - z) is
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