1. In a factory, producing of an automobile, the parts manufactured on the shop floor are required to go through quality checks, each conducted after a specific part of the processing on the raw material is completed. Only parts that are not rejected at one stage are put through subsequent stages of production and testing. If average rejection rates at these three testing stages during a month are 10%, 5% and 2% respectively, then what is the effective rejection rate for the whole plant? (4)
- (1) 17%
- (2) 15.20%
- (3) 84.80%
- (4) 16.21%
- (5) None of these
2. A speaks the truth in 75% and B in 80% cases. In what percentage of cases are they likely to contradict each other when narrating the same incident? (1)
- (1) 35
- (2) 30
- (3) 25
- (4) 20
- (5) None of these
3. In a certain store, the profit is 320% of the cost. If the cost increases by 25% but the selling price remains constant, approximately what percentage of the selling price is the profit? (2)
- (1) 30%
- (2) 70%
- (3) 100%
- (4) 250%
- (5) 85%
4. A watch passes through three hands and each gains 25%. If the third sells it for Rs 250, what did the first pay for it? (1)
- (1) 128
- (2) 130
- (3) 145
- (4) 150
- (5) None of these
5. I lost 9 percent by selling pencils at the rate of 15 a rupee. How many for a rupee must I sell them to gain 5 percent? (2)
- (1) 10
- (2) 13
- (3) 15
- (4) 18
- (5) None of these