alleryScores 2, 4, 6, 8 have what arithmetic average?
- 6
- 4
- 5
- 20
Show answer and solution
Correct answer: C. 5
The sum is 20 and there are four values, so the mean is 5.
ICSE Class 10 Statistics and Probability — practice questions — page 2
Explore 112 free Statistics and Probability questions in ICSE Class 10 Mathematics. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–60 of 112.
Scores 2, 4, 6, 8 have what arithmetic average?Read the answer and worked solution →Order five measures: 3, 5, 8, 10, 12. Which is central?Read the answer and worked solution →For 1, 3, 7, 9, find the value halfway between the middle pair.Read the answer and worked solution →Which value is the mode of 2, 3, 3, 4, 5?Read the answer and worked solution →Values 2, 4, 6 have frequencies 1, 2, 1. Find the mean.Read the answer and worked solution →Classes 0–10 and 10–20 have frequencies 2 and 3. Find grouped mean.Read the answer and worked solution →Grouped values have midpoints 10, 20, 30 and frequencies 1, 2, 1. Find mean.Read the answer and worked solution →Using assumed mean A=20, frequencies are 2, 3 at x=10, 20. Find mean.Read the answer and worked solution →For x=5, 15 with frequencies 2, 2, what is the mean by direct method?Read the answer and worked solution →Classes 0–10, 10–20, 20–30 have frequencies 2, 5, 3. Which is modal class?Read the answer and worked solution →Frequencies for classes 0–10, 10–20, 20–30 are 4, 9, 7. Identify median class.Read the answer and worked solution →What does the tallest bar identify in an equal-width histogram?Read the answer and worked solution →A less-than ogive is plotted. What does its vertical coordinate represent?Read the answer and worked solution →An ogive gives Q1=12 and Q3=28. Find the interquartile range.Read the answer and worked solution →An ogive shows median 24. What does 24 represent?Read the answer and worked solution →A histogram has class frequencies 3, 8, 5. Which class is modal?Read the answer and worked solution →A grouped distribution has total frequency 40. At what cumulative frequency is the median read from an ogive?Read the answer and worked solution →A distribution has Q1=18 and IQR=11. Find Q3.Read the answer and worked solution →A spinner lands on red in 30 of 120 trials. What is the experimental probability of red?Read the answer and worked solution →One ball is drawn uniformly from 9 red and 1 blue ball. Find P(blue).Read the answer and worked solution →A fair six-sided die shows 1 to 6. What is P(a score above 4)?Read the answer and worked solution →A card is drawn uniformly from a standard 52-card pack. What is P(a king)?Read the answer and worked solution →Pick an integer uniformly from 1 to 12. What is P(a factor of 12)?Read the answer and worked solution →A fair spinner has three equal sectors labelled A, A, B. Find P(A).Read the answer and worked solution →With all 52 standard cards equally likely, find the chance of drawing either black ace.Read the answer and worked solution →A month is chosen uniformly from the 12 months. What is P(it has exactly 30 days)?Read the answer and worked solution →A fair coin gave ten heads in a row. Its next toss is independent. Find P(head).Read the answer and worked solution →Find the chance that the product of two fair die scores (1 to 6) is odd.Read the answer and worked solution →Two fair dice numbered 1 to 6 are rolled. Find P(the scores differ by 5).Read the answer and worked solution →Roll two fair dice numbered 1 to 6. What is P(unequal scores)?Read the answer and worked solution →
Worked practice questions
Order five measures: 3, 5, 8, 10, 12. Which is central?
- 5
- 10
- 7.6
- 8
Show answer and solution
Correct answer: D. 8
The middle of the five ordered values is 8.
For 1, 3, 7, 9, find the value halfway between the middle pair.
- 4
- 7
- 5
- 3
Show answer and solution
Correct answer: C. 5
For four values, the median is the mean of the middle pair: (3+7)/2=5.
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