Probability that of calculators will be defective
The F.S. Supplies Company buys calculators from a Japanese supplier. The probability of a defective calculator is 20%. If 15 calculators are selected at random, what is the probability that 5 or more of the calculators will be defective?
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Consider a 1.0 kW fuel-cell assembly operating at 50% efficiency. (a) How many litres of water does it produce per hour? (b) If its fuel is natural gas (CH4), what fraction of a cubic meter does it consume ea. hour and what is the cost if natural
Two ice skaters push off against one another starting from a stationary position. The 45-kg skater acquires a speed of 0.375 m/s. What speed does the 60-kg skater acquire?
A door-to-door sale person for a Household appliance learned from her past experience that out of twenty demonstrations of her appliance only seven result in actual sales (long run average). This week she needs to make at least four sales. At leas
After the collision, the 80.0-g puck moves in a direction that makes an angle of 45.0° with the original direction of motion and the 100-g puck moves at an angle of 12.0° in the opposite direction. What is the speed of the 80.0-g puck afte
A 60.0-kg man stands at one end of a 20.0-kg uniform 10.0-m long board. How far from the man is the center of mass of the man-board system?
A sample space S consists of five simple events with these probabilities:
A drag racer that weighs 1600 lb attains a speed of 270 mph in a quarter mile. Immediately after passing through the timing lights, the driver opens a round drag chute with a diameter of 6 ft.
A 310-g air track cart is traveling at 1.25 m/s and a 260-g cart traveling in the opposite direction at 1.33 m/s. What is the speed of the center of mass of the two carts?
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