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29-09-2021 Answers

1. The children are very quiet. I hope they are not getting _____ anything they should not be. Answer: up to 2. I thought my Maths book was lost, and I ______ it all over the house. Answer: looked for 3. I have been studying hard, I hope to ________ my English exam. Answer: get through 4. After my little brother was born, my parents told me that I would have to ______ him. Answer: look after 5. After the hostages had been in captivity for two weeks, the terrorists finally decided to ______ to the police. Answer: give themselves up 6. They got married so young that it is hardly surprising it did not work _____ . Answer: out 7. Dave is very happy because his daughter has just got _____ a good university. Answer: into 8. At the political demonstration the activists were busy _____ tracts against the government. Answer: giving out 9. Your plane _______ at 5.40 am, sir. Answer: took off  10. I thought it was a greatreat little restaurant, but for some reason, it just did not catch _____ . A
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05-09-2021 Answers

 1. In a class 52% of the students are girls of which 25% are interested in tennis. What is the probability that a randomly selected student from the class is a girl who is interested in tennis? Answer: 13/100 Solution: Assume 100 students are in the class. Num of girls = 52 Girls interested in tennis = 52 * 25/100 = 13 Reqd probability = 13/100 2. On a highway, the probability of seeing an ambulance during a twenty-minutes period is 11/36. What is the probability of not seeing an ambulance in a ten-minutes period? Answer: 5/6 Solution: Probability of not seeing an ambulance in 20 mins period = 1 - 11/36 = 25/36 Probability of not seeing a lorry in 10 mins period = Square root of 25/36 = 5/6 3. Find the probability that 2 men selected at random were born in the same month. Answer: 1/12 Solution: The first person can be born in any of the 12 months. The second person also being born in the same month = 1/12. 4. Four boys and three girls stand in queue for an interview. The probability t
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11/07/21 Answers

1. A man can row 8 km/hr in still water. In a river running at 2 km/hr an hour, it takes him 40 minutes to row to a place and back, how far off is the place? Answer: 2.5 kms Solution:  u = 8 km/hr;  v = 2 km/hr Speed downstream = (u+v) = 10 km/hr;  Speed upstream = (u-v) = 6 km/hr Let x be the length of the river x/10 + x/6 = 40/60; x = 2.5 kms 2.  A man takes 3 hours 15 minutes to row a boat 13 kms downstream of a river and 1 hours 30 minutes to cover a distance of 4.5 kms upstream. Find the rate of current in km/hr.  Answer:  1/2 km/hr  Solution:   Rate downstream = 13/(13/4) = 4 km/hr, Rate upstream = 4.5/3/2 = 3 km/hr; Rate of   current = 1/2(4-3) = 1/2 km/hr 3.  Speed of a boat in standing water is 9 kmph and the speed of the stream is 1 kmph. A man rows to a place at a distance of 120 km and comes back to the starting point. The total time taken by him is: Answer: 27 hours Solution:  Speed upstream = 9-1 = 8 kmph; Speed downstream = 9+1 =10 kmph. Total time taken = (120/8 + 120/1
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