Probability Test

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Probability Test - 13

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Question 1

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Use the following information to answer the next question.

A particular town has certain number of Government High Schools (having Grades 6 to 10). A survey is conducted in these schools to find the relationship between the heights of students and their respective Grades. For this purpose, 500 students are selected at random from these schools. The given table shows the result of the survey.
Height (in cm)
Grade	120−130	130−140	140−150	150−160	160−170
6	22	25	15	27	11
7	12	33	24	22	9
8	15	34	21	17	13
9	21	25	13	29	12
10	9	17	42	15	17