15. Following cards are put facing down: A E I O U. What is the chance of drawing out a vowel?
- (A) 0
- (B) 1/2
- (C) 1/3
- (D) 1
14. Following cards are put facing down: A E I O U. What is the chance of drawing out a card marked U?
- (A) 0
- (B) 1/3
- (C) 1/5
- (D) 1/2
13. Following cards are put facing down: A E I O U. What is the chance of drawing out A or I?
- (A) 0
- (B) 1/5
- (C) 2/5
- (D) 1
12. Following cards are put facing down: A E I O U. What is the chance of drawing out a consonant?
- (A) 0
- (B) 1/2
- (C) 1/3
- (D) 1
11. What is the probability that a student chosen at random out of 3 girls and 4 boys is a boy?
- (A) 1/4
- (B) 3/4
- (C) 1/7
- (D) 4/7
10. The letters written on paper slips of the word MEDIAN are put in a bag. If one slip is drawn randomly, what is the probability that it bears the letter D?
- (A) 1/2
- (B) 1/3
- (C) 1/5
- (D) 1/6
9. The mean of 10 observations was calculated as 40. It was detected on rechecking that the value of 45 was wrongly copied as 15. The correct mean is
- (A) 41
- (B) 42
- (C) 43
- (D) 40
8. The number of trees in different parks of a city are 33, 38, 48, 33, 34, 34, 33 and 24. The mode of this data is
- (A) 24
- (B) 34
- (C) 33
- (D) 48
7. Out of 5 brands of chocolates in a shop, a boy has to purchase the brand which is most liked by children. What measure of central tendency would be most appropriate if the data is provided to him?
- (A) Mean
- (B) Mode
- (C) Median
- (D) Any of the three
6. In a school, only 2 out of 5 students can participate in a quiz. What is the chance that a student picked at random makes it to the competition?
- (A) 20%
- (B) 40%
- (C) 50%
- (D) 30%
5. The mean of three numbers is 40. All the three numbers are different natural numbers. If lowest is 19, what could be highest possible number of remaining two numbers?
- (A) 81
- (B) 40
- (C) 100
- (D) 71
4. Kailash earned scores of 97, 73 and 88 respectively in his first three examinations. If he scored 80 in the fourth examination, then his average score will be
- (A) Increased by 1
- (B) Increased by 1.5
- (C) Decreased by 1
- (D) Decreased by 1.5
3. A coin is tossed 15 times and the outcomes are recorded as H T T H T H H H T T H T H T T. The chance of occurrence of a head is
- (A) 7/15
- (B) 8/15
- (C) 6/15
- (D) 9/15
2. Let x be the range of the data 2, –5, 4, 3, 7, 6 and y be the range of the data when each of the previous observations is decreased by 2. Which among the following is true?
- (A) x > y
- (B) x < y
- (C) x = y
- (D) None of these
1. Let x be the range of the data 3, 7, 1, –2, 2, 6, –3, –5 and y be the range of the data when each of the previous observations is increased by 8. Which among the following is true?
- (A) x > y
- (B) x < y
- (C) x = y
- (D) None of these