# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 854 - 861 of 931

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## Question 854

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### Question

MCQ▾

If , then , is ________.

### Choices

Choice (4)Response
a.2
b.3
c.0
d.1

## Question 855

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### Question

MCQ▾

A and B invest in a business in the ratio. If of the total profit goes to charity and A’s share is Rs. 855, the total profit is ________

### Choices

Choice (4)Response
a.Rs. 1500
b.Rs. 1537.50
c.Rs. 1425
d.Rs. 1576

## Question 856

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### Question

MCQ▾

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.24.8
b.15
c.15.83
d.24

## Question 857

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### Question

MCQ▾

The ratio of two supplementary angles is , What is the measure of the greater angle?

### Choices

Choice (4)Response
a.100˚
b.160˚
c.140˚
d.120˚

## Question 858

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### Question

MCQ▾

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 859

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### Question

MCQ▾

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

### Choices

Choice (4)Response
a.54
b.74
c.47
d.88

## Question 860

Edit

MCQ▾

, then =

### Choices

Choice (4)Response
a.4
b.2
c.-1
d.0

## Question 861

Edit

### Question

MCQ▾

A 150 metres long train crosses a man walking at the speed of 6 km/hr in the opposite direction in 6 seconds. The speed of the train in km/hr is ________

### Choices

Choice (4)Response
a.66
b.96
c.84
d.106