Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 55 - 61 of 101

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Question number: 55

» Statistics and Probability

MCQ▾

Question

A card is drawn at random from a well shuffled pack of 52 cards. The probability that the ‘9’ of red color card is ________

Choices

Choice (4) Response
a.

149

b.

12

c.

249

d.

492

Passage

A Train is going on a long journey for 20 hours, starting at 3.00 hrs. The speed of the car at different hours is given below:

Train with its speed values is given

Calculate the values as asked in question

Time (in hrs):

3

5

8

10

12

15

18

20

23

Speed (in km/hour):

60

70

90

50

60

75

60

30

60

From the above table answer the following questions.

Question number: 56 (1 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

Question

The average speed (in km/hour) between 10.00 hrs, 12.00 hrs and 15.00 hrs is ________

Choices

Choice (4) Response
a.

62

b.

63

c.

68

d.

57

Question number: 57 (2 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

Question

The percentage of increase in speed during 10.00 hrs and 12.00 hrs is ________

Choices

Choice (4) Response
a.

16%

b.

1823%

c.

20%

d.

1613%

Question number: 58 (3 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

Question

The percentage of decrease in speed during 18.00 hrs and 20.00 hrs is ________

Choices

Choice (4) Response
a.

80%

b.

30%

c.

50%

d.

40%

Question number: 59

» Statistics and Probability

MCQ▾

Question

Mean marks scored by 40 students were found to be 60. Later it was observed that a score of 48 was misread as 84. Then the correct mean is ________

Choices

Choice (4) Response
a.

59.1

b.

58.2

c.

59

d.

58

Question number: 60

» Statistics and Probability

MCQ▾

Question

The mean of 20 items is 17 and if each item is increased by 3, then its mean will be ________

Choices

Choice (4) Response
a.

70

b.

50

c.

60

d.

20

Question number: 61

» Statistics and Probability

MCQ▾

Question

The difference between the maximum and the minimum observation in the data is called ________

Choices

Choice (4) Response
a.

Frequency

b.

Class interval

c.

Range

d.

Cumulative frequency

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