# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 372 - 378 of 968

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## Question number: 372

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MCQ▾

### Question

If occur with frequencies respectively, then the arithmetic mean is ________

### Choices

Choice (4) Response

a.

120

b.

125

c.

115

d.

111

## Question number: 373

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MCQ▾

### Question

The mean of 11 observations is 30. If the mean of the first 6 observations is 40 and that of the last 6 observations is 44, then the Sixth observation is ________

### Choices

Choice (4) Response

a.

174

b.

131

c.

137

d.

128

## Question number: 374

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MCQ▾

### Question

The coordinates of the centre of a circle passing through is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 375

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MCQ▾

### Question

Find the area of triangle if the coordinates of vertices are is ________

### Choices

Choice (4) Response

a.

2 sq. units.

b.

5 sq. units

c.

9 sq. units

d.

3 sq. units

## Question number: 376

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MCQ▾

### Question

Find the area of the quadrilateral, the coordinates of whose angular points taken in order are.

### Choices

Choice (4) Response

a.

8

b.

12

c.

10

d.

6

## Question number: 377

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MCQ▾

### Question

Find the area of triangle if the coordinates of vertices are is ________

### Choices

Choice (4) Response

a.

45.2 sq. units

b.

20.5 sq. units.

c.

19.3 sq. units

d.

33.5 sq. units

## Question number: 378

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MCQ▾

### Question

The mean weight of a class of 24 students is kg. if the weight of the teacher is included, the mean rises by 400 g. Then the weight of the teacher is ________

### Choices

Choice (4) Response

a.

65 kg

b.

50 kg

c.

55 kg

d.

45 kg