What is the arithmetic mean of: 42, 41, 20, 13, 34?
- A25
- B32
- C29
- D30
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Answer: (D) 30
Mean = sum ÷ count = 150 ÷ 5 = 30.
ISRO Scientist Statistics Questions with Answers & Explanations
20 Statistics questions from the Engineering Mathematics section of ISRO Scientist, each with the correct answer and a worked explanation. Try each question first, then tap Show answer to check. When you're ready, take the timed chapter-wise test to see your all-India rank.
What is the arithmetic mean of: 40, 7, 6, 13, 33, 81?
- A25
- B31
- C28
- D30
Show answer
Answer: (D) 30
Mean = sum ÷ count = 180 ÷ 6 = 30.
What is the arithmetic mean of: 25, 12, 48, 35, 40, 45, 34?
- A32.14
- B34.14
- C39.14
- D33.14
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Answer: (B) 34.14
Mean = sum ÷ count = 239 ÷ 7 = 34.14.
What is the arithmetic mean of: 16, 9, 18, 45, 19?
- A26.4
- B21.4
- C23.4
- D19.4
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Answer: (B) 21.4
Mean = sum ÷ count = 107 ÷ 5 = 21.4.
What is the arithmetic mean of: 14, 43, 44, 15, 19?
- A22
- B28
- C27
- D26
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Answer: (C) 27
Mean = sum ÷ count = 135 ÷ 5 = 27.
What is the arithmetic mean of: 14, 33, 14, 32, 11?
- A15.8
- B19.8
- C20.8
- D23.8
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Answer: (C) 20.8
Mean = sum ÷ count = 104 ÷ 5 = 20.8.
What is the arithmetic mean of: 32, 46, 42, 50, 24?
- A35.8
- B43.8
- C38.8
- D36.8
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Answer: (C) 38.8
Mean = sum ÷ count = 194 ÷ 5 = 38.8.
What is the arithmetic mean of: 20, 42, 30, 43, 40?
- A37
- B38
- C35
- D34
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Answer: (C) 35
Mean = sum ÷ count = 175 ÷ 5 = 35.
What is the arithmetic mean of: 13, 9, 21, 50, 35, 4?
- A25
- B21
- C24
- D22
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Answer: (D) 22
Mean = sum ÷ count = 132 ÷ 6 = 22.
What is the arithmetic mean of: 36, 9, 28, 45, 46?
- A29.8
- B30.8
- C27.8
- D32.8
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Answer: (D) 32.8
Mean = sum ÷ count = 164 ÷ 5 = 32.8.
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What is the arithmetic mean of: 38, 9, 43, 29, 11?
- A24
- B27
- C28
- D26
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Answer: (D) 26
Mean = sum ÷ count = 130 ÷ 5 = 26.
What is the arithmetic mean of: 8, 47, 5, 43, 33, 50?
- A31
- B29
- C34
- D33
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Answer: (A) 31
Mean = sum ÷ count = 186 ÷ 6 = 31.
What is the arithmetic mean of: 37, 5, 45, 9, 38, 76?
- A30
- B36
- C35
- D38
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Answer: (C) 35
Mean = sum ÷ count = 210 ÷ 6 = 35.
What is the arithmetic mean of: 12, 8, 48, 29, 49, 4?
- A22
- B23
- C25
- D24
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Answer: (C) 25
Mean = sum ÷ count = 150 ÷ 6 = 25.
What is the arithmetic mean of: 42, 6, 7, 27, 32, 78?
- A27
- B32
- C34
- D31
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Answer: (B) 32
Mean = sum ÷ count = 192 ÷ 6 = 32.
What is the arithmetic mean of: 36, 26, 14, 26, 30, 25, 46?
- A34
- B31
- C24
- D29
Show answer
Answer: (D) 29
Mean = sum ÷ count = 203 ÷ 7 = 29.
What is the arithmetic mean of: 37, 27, 28, 43, 49, 37, 24?
- A37
- B34
- C35
- D40
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Answer: (C) 35
Mean = sum ÷ count = 245 ÷ 7 = 35.
What is the arithmetic mean of: 41, 28, 48, 30, 24, 27?
- A34
- B38
- C33
- D32
Show answer
Answer: (C) 33
Mean = sum ÷ count = 198 ÷ 6 = 33.
What is the arithmetic mean of: 6, 15, 42, 17, 25, 11, 129?
- A38
- B32
- C37
- D35
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Answer: (D) 35
Mean = sum ÷ count = 245 ÷ 7 = 35.
What is the arithmetic mean of: 20, 22, 24, 34, 23, 27?
- A25
- B28
- C27
- D26
Show answer
Answer: (A) 25
Mean = sum ÷ count = 150 ÷ 6 = 25.
These are RankerClub practice questions written in the ISRO Scientist pattern. They are not official SSC/IBPS/RRB papers.
