Math Prob/solving

posted by .

As Frank drives to work he has to pass through three lights. The probability that any light is green is 39%. Estimate the probability that exactly two lights will be green. Use the following list of digits which was taken from a table of random numbers. In each pair of digits, let 00-38 represent a green light and let the digits 39-99 represent a light that is not green. Start at the top left of the table and move all the way across to the right of the table before moving down to the next row.

A)7/25 B) 5/25
C)6/25 D)4/25

  • Math Prob/solving -

    You have not provided the random number table, but a combinatorial formula can be used for the exact probability

    P = (0.39)^2*(0.61)*[3!/2!) = 0.27834 = 6.96/25

    Answer A is closest.

  • Math Prob/solving -

    Julie is solving the equation x2 + 5x + 6 = 0 and notices that the discriminant b2 - 4ac has a value of 1. This tells her that the equation has

  • Math Prob/solving -

    If a storm window has an area of 315 square inches, which equation can be used to find the dimensions when the window is 6 inches higher than it is wide (x represents height)?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Statistics

    A box contains 12 lights bulbs, of which 4 are defective. All bulbs look alike and have equal chance of being chosen. 3 light bulbs are selected from the box to check the quality. a. List all the possible outcomes b. find the probability …
  2. maths

    A building has three rooms. Each room has two separate electric lights. There are thus six Electric lights altogether. After a certain time there is a probability of 0.1 that a given light will have failed and all light are independent …
  3. probability

    a teacher on her way to work passes through 3 stoplights each morning. the distances between the stop lights are great and the lights operate independently of each other. if the probability of the red lights are .4,.8 and .6 for each …
  4. math

    Marley drives to work every day and passes two independently operated traffic lights. The probability that both lights are red is 0.35. The probability that the first light is red is 0.48. What is the probability that the second light …
  5. statistic

    A student must pass through 12 sets of traffic lights on his way to university. Suppose that each of the lights is green 39.5% of the time, yellow 5.9% of the time, and red 54.6% of the time. Suppose also that the traffic lights function …
  6. Finite Math

    A box contains two defective Christmas tree lights that have been inadvertently mixed with eight nondefective lights. If the lights are selected one at a time without replacement and tested until both defective lights are found, what …
  7. statistics

    24. Suppose there are five traffic lights that you need to pass while driving from your work to school. The probabilities that you will stop for these red lights are: 0 red light with probability 0.05, 1 red light with probability …
  8. Statistics

    Achusband and wife with brown eyes who have 0.75 probability of having children with brown eyes, 0.125 probability of having children with blue eyes, and 0.125 probability of having children with green eyes. (a) What is the probability …
  9. MATH HELP

    A Lights-A-Lot quality inspector examines a sample of 25 strings of lights and finds that 6 are defective. a. What is the experimental probability that a string of lights is defective?
  10. math

    Ms. Tucker travels through two intersections with traffic lights as she drives to the market. The traffic lights operate independently. The probability that both lights will be red when she reaches them is .22. the probability that …

More Similar Questions