ICSE Class X Math 2019 Solved Paper

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Question : 25 of 32
 
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The data on the number of patients attending a hospital in a month are given below. Find the average (mean) number of patients attending the hospital in a month by using the shortcut method.
Take the assumed mean as 45 . Give your answer correct to 2 decimal places.
Number of patients 10−20 20−30 30−40 40−50 50−60 60−70
Number of Days 5 2 7 9 2 5
Solution:
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