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A teacher analyses the performance of tw...

A teacher analyses the performance of two sections of students in a mathematics test of 100 marks given in the following table.

Find the probability that a student obtained less than 20 in the mathematics test.

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The correct Answer is:
`7/90`
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SUBHASH PUBLICATION-PROBABILITY -EXERCISE 15.1
  1. 1500 families with 2 children were selected randomly, and the followin...

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  2. In a particular section of Class IX, 40 students were asked about the ...

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  3. Three coins are tossed simultaneously 200 times with the following fre...

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  4. An organisation selected 2400 families at random and surveyed them to ...

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  5. An organisation selected 2400 families at random and surveyed them to ...

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  6. An organisation selected 2400 families at random and surveyed them to ...

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  7. An organisation selected 2400 families at random and surveyed them to ...

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  8. An organisation selected 2400 families at random and surveyed them to ...

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  9. A teacher analyses the performance of two sections of students in a ma...

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  10. A teacher analyses the performance of two sections of students in a ma...

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  11. To know the opinion of the students about the subject statistics , a s...

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  12. To know the opinion of the students about the subject statistics , a s...

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  13. Distance (in km) of 40 engineers from their place of residence to thei...

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  14. Distance (in km) of 40 engineers from their place of residence to thei...

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  15. Distance (in km) of 40 engineers from their place of residence to thei...

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  16. Activity : Note the frequency of two - wheelers , three - wheelers and...

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  17. Activity : Ask all the students in your class to write a 3 - digit num...

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  18. Eleven bags of wheat flour, each marked 5 kg actually contained the fo...

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  19. In , you were asked to prepare a frequency distribution table regardin...

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  20. In , you were asked to prepare a frequency distribution table regardin...

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