1. Three unbiased coins are tossed, what is the probability of getting at least 2 tails? (3)
- (1) 1/3
- (2) 1/9
- (3) 1/2
- (4) 1/8
- (5) None of these
2. What is the probability of getting a sum 9 from two throws of dice. (2)
- (1) 1/3
- (2) 1/9
- (3) 1/12
- (4) 2/9
- (5) None of these
3. An article is sold at a loss of 10%. Had it been sold for Rs.9 more, there would have been a gain of 25/2% on it, then what is the cost price of the article? (3)
- (1) Rs. 74
- (2) Rs.60
- (3) Rs. 40
- (4) Rs.80
- (5) None of these
4. In a journey of 160 km, a train covers the distance 120 km at a speed of 80 km/h and the remaining distance at 40 km/h. Find the average speed of the train for the whole journey. (2)
- (1) 60 km/h
- (2) 64 km/h
- (3) 40 km/h
- (4) 45 km/h
- (5) None of these
5. If A is 20% more than B, then by what percent B is less than A? (1)
- (1) 16.67%
- (2) 25%
- (3) 16.34%
- (4) 20%
- (5) None of these