Question 426630: I need some help on a couple of problems. Could some one walk me through step by step on them. Thanks
1)A town has 5-digit telephone numbers, none of which begins with
0. The third digit of the telephone number is an odd integer.
In how many ways can a wrong number be dialed if the last 2
digits of the number are correct?
2)A bag contains 10 green candies, 3 red candies, and 5 orange
candies.
What is the probability of drawing and eating first a green, then a
red, and then an orange candy?
3)A bag contains 9 balls numbered 1 through 9. A person draws 4
balls from the bag at the same time, and then the person writes
down the numbers on the balls in increasing order.
What is the probability that the sequence 2, 5, 7, 9 will be written
down?
4)An insurance company offers a one-year $250,000 life insurance
policy to 30-year-old females. Suppose the probability is 0.9995
that a 30-year old female will live for a year. The company wants
to make a profit of $175 per policy.
What should the insurance company charge for the policy?
5) A person has 3 differently colored coats: red, black, and white; and
3 differently colored hats: red, black, and white. The person
randomly grabs a hat and coat.
Find the probability that a red coat and a black hat are chosen.
6)A person randomly selects 4 cards (without replacement) from a shuffled deck of 52 cards of
which 26 are blue and the remaining 26 are red.
What is the probability that 1 card is blue and 3 are red?
7) A math student guesses all the answers on a 15 question quiz.
Assuming that the student guesses correctly 57% on each item, what is the probability of getting
at most 8 answers correct on the quiz?
8)A quiz contains 3 true or false questions. A student randomly selects answers.
Find the probability that the student answers at most 2 questions correctly.
Any help would be greatly appreciated.
Thanks
Answer by richard1234(7193)   (Show Source):
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