posted by .

If red has a probability of occurrence of .70 and black has a probability of occurrence of .30 and they are the only choices what is the probability that you pick the right color 10 out of 10 times and what is the standard deviation. I keep getting (.70*.50) + (.30*.50) = .50, IT THIS CORRECT AND WHAT IS STD DEV?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Probability -- Help?

    Sampling one at a time with replacement from a bag with 8 blue, 7 red, and 5 green. What is the probability of getting at least two red in 3 draws?
  2. statistics

    I have an ordianry deck of 52 cards, which has 26 red and 26 black cards. A friend shuffles the deck and draws cards at random, replacing the card and reshuffling after each guess. I attempt to guess the color of each card. A. what …
  3. statistics help needed

    In the game of roulette, a steel ball is rolled onto a wheel that contains 18 red, 18 black, and 2 green slots. If the ball is rolled 24 times, find the probability of the following events. A. The ball falls into the green slots 4 …
  4. Math: Probability

    I need help. Here's the queston. Julia has 3 red marbles, 4 blues,3 yellow and 6 black in a bag. She takes one out at random. The probability its black ___ The probability its yellow ___ The probability it isnt red ___
  5. statistics

    15.34 In a four-digit lottery, each of the four digits is supposed to have the same probability of occurrence. The table shows the frequency of occurrence of each digit for 89 consecutive daily fourdigit drawings. Research question: …
  6. math

    Two events are _________ if the outcome or occurrence of the first affects the outcome or occurrence of the second so that the probability is changed. Please Help Me . !
  7. probabilities

    The proportion of red marbels in a large jar of red and black marbels is 0.4 and the percentage of damaged red and black marbels is 0.7. What is the probability of selecting randomly a black and damaged marbel?
  8. Statistics

    Red has probability .30 and black has probability .70. What is the probability that patron will win all ten wagers if alternating between red and black on each wager?
  9. math 4

    For the spinner above, the probability of landing on black is 1/2, and the probability of landing on red is 1/3, Suppose it is spun three times. What is the probability it will land on black all three times?
  10. Stats/Probability

    If 23% of the cars that pass by your house each day are red, 12% green, 4% yellow, and 31% black; what is the probability the next car to pass your house will be red or yellow?

More Similar Questions