Defence Exams
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Q. If a test for a disease has a sensitivity of 90% and a specificity of 95%, what is the probability that a person who tests positive actually has the disease, given that the prevalence is 1%? (2022)
Q. If a test for a disease has a sensitivity of 90% and a specificity of 95%, what is the probability of a true positive result if the prevalence of the disease is 1%? (2022)
Q. If a train travels 120 km in 1.5 hours, what is its speed in km/h? (2023)
Q. If a train travels 300 km in 4 hours, what is its speed in km/h? (2023)
Q. If a train travels 60 km in 1 hour, how far will it travel in 3 hours?
Q. If a train travels at a speed of 60 km/h, how far will it travel in 2.5 hours?
Q. If a train travels at a speed of 80 km/h, how long will it take to cover 320 km?
Q. If a trait is controlled by a single gene with two alleles, where A is dominant over a, what is the expected phenotypic ratio in the offspring of a cross between Aa and aa?
Q. If a trait is sex-linked and recessive, what is the probability that a son will express the trait if his mother is a carrier and his father does not have the trait?
Q. If a transversal intersects two parallel lines, how many pairs of corresponding angles are formed? (2023)
Q. If a transversal intersects two parallel lines, what can be said about the same-side interior angles? (2023)
Q. If a treatment is effective in 80% of cases, what is the probability that it will be effective for at least one out of three patients? (2023)
Q. If a treatment is effective in 80% of cases, what is the probability that it will be effective for 3 out of 5 patients? (2020)
Q. If a triangle has a base of 8 cm and a height of 5 cm, what is its area?
Q. If a triangle has an area of 30 square units and a base of 10 units, what is its height?
Q. If a triangle has an area of 30 square units and a base of 10 units, what is the height?
Q. If a triangle has angles of 30° and 60°, what is the measure of the third angle?
Q. If a triangle has sides of lengths 3 cm, 4 cm, and 5 cm, is it a right triangle?
Q. If a triangle has sides of lengths 3 cm, 4 cm, and 5 cm, what is its area? (2021)
Q. If a triangle has sides of lengths 3 cm, 4 cm, and 5 cm, what type of triangle is it? (2022)
Q. If a triangle has sides of lengths 5 cm, 12 cm, and 13 cm, is it a right triangle? (2022)
Q. If a triangle has sides of lengths 7 cm, 24 cm, and 25 cm, is it a right triangle? (2020)
Q. If a triangle has two sides of lengths 6 and 8, what is the maximum possible length of the third side?
Q. If a triangle has two sides of lengths 7 and 24, what is the maximum possible length of the third side?
Q. If a vaccine reduces the risk of infection by 75%, what is the probability of infection after vaccination if the initial probability of infection is 0.1? (2020)
Q. If a vaccine reduces the risk of infection by 75%, what is the probability of infection after vaccination if the initial probability of infection is 0.2? (2020)
Q. If a vehicle travels 100 km in 2 hours and then 50 km in 1 hour, what is its average speed for the entire trip? (2019)
Q. If a vehicle travels 90 km in 1.5 hours, what is its speed in km/h? (2022)
Q. If a weight is recorded as 0.050 kg, how many significant figures does this weight have?
Q. If a wire carries a current of 3 A and has a resistance of 2 ohms, what is the power dissipated in the wire?