Age (in years) Number of teachers | |
20-25 | 70 |
25-30 | 110 |
30-35 | 165 |
35-40 | 320 |
40-45 | 200 |
45-50 | 135 |
A) Probability of a teacher having age greater than or equal to 35, is\[\frac{131}{200}.\].
B) Probability of at eacher having age more than or equal to 25 and less than 40, is\[\frac{119}{200}.\]
C) Probability of a teacher selected is of age not less than 30, is \[\frac{17}{200}.\]
D) Probability of a teacher selected from the youngest group, is \[\frac{14}{200}.\]
Correct Answer: C
Solution :
Total number of teacher = 70 + 11 +165 + 320 + 200 + 135 = 1000 (a) Number of teachers having the age greater than or equal to 35 are (320 + 200 +135) = 655 Required probability (b) Number of teacher having age more than or equal to 25 and less than 40 = 110 + 165 + 320 + = 595 Required probability (c) Number of teachers of age not less than 30 = 165 + 320 + 200 + 135 = 820 Required probability (d) Numbers of teachers in the youngest group i.e., Required probabilityYou need to login to perform this action.
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