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प्रश्न
Suppose the annual day of your school is to be celebrated. The school has decided to felicitate the parents of the students studying in classes XI and XII, who are alumni of the same school. In this context, answer the following question:
Which statistical technique should be used to find out the number of students whose parents are alumni of this school?
उत्तर
Mean of the previous record of students whose parents are alumni.
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