# SSC CGL (SSC Combined Graduate Level) Mathematics: Questions 402 - 406 of 425

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## Question number: 402

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MCQ▾

### Question

The average marks of 50 students in a test is 80. Later it is found that three marks 60,70 & 80 were wrongly entered as 62,72 & 82. The average marks after mistakes were rectified is

### Choices

Choice (4) Response

a.

b.

c.

71.6

d.

79.98

## Question number: 403

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MCQ▾

### Question

A man bought a second-hand typewriter for Rs. 1000 and spent Rs. 600 on its repairs. He sold it for Rs. 2000. His profit percent is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 404

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MCQ▾

### Question

The distance between two stations P and Q is 1200 km. A train starts from P and moves towards Q at an average speed of 40 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 80 km/hr. How far from P will they cross each other?

### Choices

Choice (4) Response

a.

600 km

b.

200 km

c.

400 km

d.

500 km

## Question number: 405

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MCQ▾

### Question

The square root of is

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 406

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MCQ▾

### Question

The distance between two stations P and Q is 800 km. A train starts from P and moves towards Q at an average speed of 30 km/hr. another train starts from Q at the same time and moves towards P at an average speed of 70 km/hr. How far from P will they cross each other?

### Choices

Choice (4) Response

a.

240 km

b.

100 km

c.

541 km

d.

300 km

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