Priya scored 78, 85, 90, 67 and 80 marks in five subjects.
What is the least mark she must add as a sixth subject to make her overall mean exactly 80?

Question

Priya scored 78, 85, 90, 67 and 80 marks in five subjects. What is the least mark she must add as a sixth subject to make her overall mean exactly 80?

Accepted Answer

80. Required total for mean 80 over 6 subjects = 80 x 6 = 480. Sum of five = 78+85+90+67+80 = 400. Needed sixth mark = 480 - 400 = 80.

Priya scored 78, 85, 90, 67 and 80 marks in five subjects.
What is the least mark she must add as a sixth subject to make her overall mean exactly 80?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Measures of Central Tendency practice

Priya scored 78, 85, 90, 67 and 80 marks in five subjects.What is the least mark she must add as a sixth subject to make her overall mean exactly 80?

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 9 Measures of Central Tendency practice

Priya scored 78, 85, 90, 67 and 80 marks in five subjects.
What is the least mark she must add as a sixth subject to make her overall mean exactly 80?