# Statistics and Probability (IMO- Mathematics Olympiad Class 9): Questions 83 - 89 of 101

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## Question number: 83

» Statistics and Probability

MCQ▾

### Question

If the mean of 17 observations is 22 and that of another 18 observations is 10, then the mean of 35 observations is ________

### Choices

Choice (4) Response

a.

24

b.

15.83

c.

15

d.

24.8

## Question number: 84

» Statistics and Probability

MCQ▾

### Question

Two dice are thrown simultaneously. The probability of getting an even number as the sum is________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 85

» Statistics and Probability

MCQ▾

### Question

The median of the following numbers 45, 36, 88, 65, 44, 21, 85, 47, 74 is________

### Choices

Choice (4) Response

a.

47

b.

54

c.

88

d.

74

## Passage

The temperature chart of a patient is given below:

{"chart":{"plotBackgroundColor":null,"plotShadow":true,"backgroundColor":"transparent","width":600},"title":{"text":"Time (in hours) VS Temperature(°F)"},"tooltip":{"pointFormat":"{series.name}: {point.y}"},"credits":{"enabled":false},"xAxis":{"type":"linear","title":{"text":"Time (in hours)"}},"yAxis":{"type":"linear","title":{"text":"Temperature(Fahrenheit)"}},"plotOptions":{"series":{"allowPointSelect":true,"cursor":"pointer"}},"legend":{"floating":false,"backgroundColor":"white","borderColor":"silver","borderWidth":1,"shadow":true,"align":"right"},"series":[{"type":"scatter","name":"Time (in hours) VS Temperature(°F)","data":[[9,100],[11,102],[13,100],[15,104],[17,99],[19,98],[21,100]],"colors":[{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#7cb5ec"],[1,"rgb(48,105,160)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#434348"],[1,"rgb(0,0,0)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#90ed7d"],[1,"rgb(68,161,49)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#f7a35c"],[1,"rgb(171,87,16)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#8085e9"],[1,"rgb(52,57,157)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#f15c80"],[1,"rgb(165,16,52)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#e4d354"],[1,"rgb(152,135,8)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#2b908f"],[1,"rgb(0,68,67)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#f45b5b"],[1,"rgb(168,15,15)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":1,"y2":0},"stops":[[0,"#91e8e1"],[1,"rgb(69,156,149)"]]}],"dataLabels":{"enabled":true,"style":{"color":"black"},"connectorColor":"silver"}}]}

## Question number: 86 (1 of 5 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The percentage increase in temperature between 11.00 hrs and 15.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 87 (2 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: 88 (3 of 5 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The percentage decrease in temperature between 17.00 hrs and 19.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 89 (4 of 5 Based on Passage) Show Passage

» Statistics and Probability

MCQ▾

### Question

The average temperature of the patient between 13.00 hrs, 15.00 hrs and 17.00 hrs is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page