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Question : Marks scored by a student in different subjects are given in the table below

Subjects Marks obtained out of 100
English 55
Hindi 90
Mathematics 75
Science 80
Foreign Language 90

Five marks are to be deducted from each subject due to a shortage of attendance. The net average of the mean, median and mode of the marks obtained is_______.

Option 1: 79.33

Option 2: 77.67

Option 3: 82.66

Option 4: 73


Team Careers360 10th Jan, 2024
Answer (1)
Team Careers360 18th Jan, 2024

Correct Answer: 77.67


Solution : According to the question,
5 marks are deducted from each subject.
⇒ New marks will be:

Subjects Marks obtained out of 100
English 55 - 5 = 50
Hindi 90 - 5 = 85
Mathematics 75 - 5 = 70
Science 80 - 5 = 75
Foreign Language 90 - 5 = 85

⇒ Mean = $\frac{50+85+70+75+85}{5}$ = $\frac{365}{5}$ = $73$
Arranging the data in ascending order:
50, 70, 75, 85, 85
⇒ Median = middle term = 75
Now, Mode = Most occurred value = 85
So, the net average of Mean, Median, and Mode = $\frac{73+75+85}{3}$ = $\frac{233}{3}$ = 77.67
Hence, the correct answer is 77.67.

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