# Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 54 - 60 of 101

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## Question number: 54

» Statistics and Probability

MCQ▾

### Question

Average weight of 9 persons is 48 kg. If one man weighing 32 kg, died, what is an average age of the remaining 8 persons.

### Choices

Choice (4) Response

a.

50

b.

52

c.

54

d.

56

## 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.

b.

c.

d.

## 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:

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 57 (2 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: 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.

b.

c.

d.

## 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

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