# IMO Level 1- Mathematics Olympiad (SOF) Class 10: Questions 541 - 545 of 968

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## Question number: 541

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MCQ▾

### Question

A girl calculates that the probability of her winning the first prize in a lottery is 0.08. If 6000 tickets are sold, how many tickets has she bought?

### Choices

Choice (4) Response

a.

750

b.

240

c.

480

d.

40

## Question number: 542

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MCQ▾

### Question

One year ago the ratio between Shravan’s and Pushkar’s salary was. The ratios of their individual salaries between last year’s and this year’s salaries are and respectively. At present, the total of their salary is Rs. 3420. The salary of Pushkar’s now, is ________

### Choices

Choice (4) Response

a.

Rs. 1440

b.

Rs. 1640

c.

Rs. 1540

d.

Rs. 1740

## Question number: 543

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MCQ▾

### Question

The Noida office of HP has 2000 executives. Of these 1200 use Saurashtra mail and 700 use Gujarat mail. 200 use both Saurashtra and the Gujarat mail. If an executive is picked at random, what is the probability that he has used Gujarat mail?

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 544

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MCQ▾

### Question

3 men and 10 boys can do a piece of work in 8 day, 3 men and 6 boys can do the same in 10 days. 5 men and 10 boys can do 4 times the amount of this work in ________

### Choices

Choice (4) Response

a.

52 days

b.

22 days

c.

32 days

d.

42 days

## Question number: 545

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MCQ▾

### Question

One year ago the ratio between Ram’s and Bharat’s salary was. The ratios of their individual salaries between last year’s and this year’s salaries are and respectively. At present the total of their salary is Rs. 1890. The salary of Ram’s now, is ________

### Choices

Choice (4) Response

a.

Rs. 1875

b.

Rs. 1975

c.

Rs. 2175

d.

Rs. 1575

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