Average Aptitude Mcq Model Questions & Answers, Practice Test for ssc cgl tier 1 2024

Question :1

The average marks of 10 students in an examination was 25. It was later found that the marks of one student had been wrongly entered as 34 instead of 43. What is the correct average?

Answer: (b)

${Sum marks of student + 34}/10 = 25$

Sum marks of 9 student = 250 - 34 = 216

Then, ${216 + 43}/10 = 25.9$

Question :2

The average age of 80 girls was 20 years, the average age of 20 of them was 22 years and that of another 20 was 24 years. Find the average age of the remaining girls.

Answer: (c)

Total age of remaining 40 girls

= (80 × 20 - 20 × 22 - 20 × 24) years

= (1600 - 440 - 480) years

= 680 years

∴ Required average age

= $680/40$ = 17 years

Question :3

The average runs conceded by a bowler in 5 matches is 45 and 15.75 in other 4 matches. What is the average runs conceded by the bowler in 9 matches?

Answer: (d)

Total runs conceded = 5 × 45 + 4 × 15.75

= 225 + 63 = 288

Required average = $288/9$ = 32

Question :4

The average expenditure of Sharma for the January to June is Rs. 4200 and he spent Rs. 1200 in January and Rs.1500 in July. The average expenditure for the months of February to July is:

Answer: (a)

Total Expenditure(Jan - June) = 4200 × 6 = 25200

Total Expenditure(Feb - June) = 25200 - 1200 = 24000

Total Expenditure(Feb - July) = 24000 + 1500 = 25500/6 = 4250

Question :5

The average value of property of Agil, Mugilan and Anitha is Rs.130cr.The Property of Agil is 20cr greater than the property value of Mugilan and Anitha property value is 50cr greater than the Agil property value. The value of property of Anitha is

Answer: (d)

Property value of Mugilan x

130 × 3 = x + x + 20 + x + 20 + 50

390 = 3x + 90

3x = 300

X = 100

Anitha = 100 + 20 + 50 = 170

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