Math

posted by .

37% of college students say they use credit cards because of the rewards program. You randomly select 10 college kids and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive.

  • Math -

    those who use it -- .37
    those who don't --- .63

    prob(exactly 2 out of 10 will use it)
    = C(10,2) (.37)^2 (.63)^8 = .003397

    b)
    more than two ---> exclude cases of none, one, and two
    prob = 1 - ( C(10,0)( .37)^0 (.63)10 + C(10,1) (.37)(.63)^9 + C(10,2) (.37)^2 (63)^8 )
    = ...
    you do the button pushing

    c) repeate abvove method for
    two cases + three cases + four cases + five cases

  • Math -

    44% of adults say cashews are their favorite kind of nut. You randomly select 12 adults and ask each to name his or her favorite nut. Find the probability that the number who say cashews are their favorite nut is (a) exactly three, (b) at least four, and (c) at most two.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    You select 10 cards randomly from a deck of 52 cards. What is the probability that all of the cards selected are face cards (i.e. jacks, queens, or kings)?
  2. Applied statistics for business and economics

    Only 0.02% of credit card holders of a company report the loss or theft of their credit cards each month. The company has 15,000 credit cards in the city of Memphis. Use the Poisson probability tables to answer the following questions. …
  3. com155

    Have I used adjectives and adverbs correctly here?
  4. Probability - PLEASE HELP

    From industry statistics, a credit card company knows that 0.8 of its potential card holders are good credit risks, and 0.2 are bad credit risks. The company uses discriminant analysis to screen credit card applicants and determine …
  5. math

    You select 8 cards randomly from a deck of 52 cards. What is the probability that all of the cards selected are face cards (i.e. jacks, queens, or kings)
  6. Statistics

    At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't have a credit card in their own name, and 23% reported that they had at least one …
  7. Statistics - Help!

    I really really need help with this. Can someone please look at it and let me know. At 100 college campuses, 1200 full-time undergraduate students were surveyed on their credit card usage. Among juniors, 65% reported that they didn't …
  8. finite

    You select 9 cards randomly from a deck of 52 cards. What is the probability that all of the cards selected are face cards (i.e. jacks, queens, or kings)?
  9. statistics

    2424​% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of …
  10. ststistics

    24% of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college …

More Similar Questions