It is decided to distribute work booke on Mathematics to the
students. obtaining less than 20 marks , giving one workbook to each of such studente .If a workbook.costs Rs.5, What sum is required to buy the work book's ?
Answers
Explanation:
) The number of students obtaining less than 20 marks is 27 + 12 = 39
Hence, the total cost to buy the work books is 5 × 39
(2) The highest mark group is 40-49. The number of students belonging to this group is 17. Hence, the total amount of money required to distribute the prize money is 10 × 17
(3) The lowest mark group is 0-9. The number of students belonging to this group is 27. Hence, the total number of problems will be solved by the students of this group is 5 × 27
(4) The total number of students is 100 (given in the question).
(a) The number of students obtaining marks ranging from 40-49 is 17. The percentage of students belonging to this group is
Hence, the statement is true.
(b) The number of students obtaining marks ranging from 10 to 29 is 12 + 20 = 32
Hence, the statement is false.
(5) The number of students getting less than 20 marks is 27 + 12
(6) The number of students getting more than 29 marks is 24 + 17
(7) The number of students getting marks between 9 to 40 is 12 + 20 + 24
(8) The number of students belonging to the highest mark group 40-49 is 17.
(9) The number of students obtaining more than 19 marks is 20 + 24 + 17