# Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 90 - 95 of 101

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## Passage

The temperature chart of a patient is given below:

## Question number: 90 (5 of 5 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The average temperature of the patient between 17.00 hrs, 19.00 hrs and 21.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 91

» Statistics and Probability

MCQ▾

### Question

A number x is chosen at random from the numbers -3, -2, -1, 0, 1, 2, 3. The probability that is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 92

» Statistics and Probability

MCQ▾

### Question

A box contains 12 balls out of which x are black. If one ball is drawn at random from the box, what is the probability that it will be a black ball? If 6 more black balls are put in the box, the probability of drawing a black ball is now double of what is was before, then x is________

### Choices

Choice (4) Response

a.

3

b.

7

c.

5

d.

2

## Passage

A Bus is going on a long journey for 25 hours, starting at 6.00 hrs. The speed of the car at different hours is given below:

 Time (in hrs): 6 8 9 13 14 18 20 22 25 Speed (in km/hour): 30 60 50 40 60 70 80 60 20

From the above table answer the following questions.

## Question number: 93 (1 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The percentage of decrease in speed during 22.00 hrs and 25.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 94 (2 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The percentage of increase in speed during 14.00 hrs and 18.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 95 (3 of 3 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The average speed (in km/hour) between 6.00 hrs, 8.00 hrs, 9.00 hrs and 13.00 hrs is ________

### Choices

Choice (4) Response

a.

45

b.

67

c.

48

d.

96

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