# The Following Table Shows the Number of Students and the Time They Utilized Daily for Their Studies. Find the Mean Time Spent by Students for Their Studies by Direct Method. - Algebra

Sum

The following table shows the number of students and the time they utilized daily for their studies. Find the mean time spent by students for their studies by direct method.

 Time (hrs.) 0 - 2 2 - 4 4 - 6 6 - 8 8 - 10 No. of students 7 18 12 10 3

#### Solution

 Class (Time in hours) Class Markxi Frequency(Number of students)fi Class mark × Frequencyxifi 0 - 2 1 7 7 2 - 4 3 18 54 4 - 6 5 12 60 6 - 8 7 10 70 8 - 10 9 3 27 $\sum_{} f_i = 50$ $\sum_{} x_i f_i = 218$

Mean = $\frac{\sum_{} x_i f_i}{\sum_{} f_i}$

$= \frac{218}{50}$

= 4.36 hours
Hence, the mean time spent by students for their studies is 4.36 hours.

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Chapter 6: Statistics - Practice Set 6.1 [Page 138]

#### APPEARS IN

Balbharati Maths 1 Algebra 10th Standard SSC Maharashtra State Board
Chapter 6 Statistics
Practice Set 6.1 | Q 1 | Page 138

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