Tutors Answer Your Questions about Permutations (FREE)
Question 320691: To build a sandwich at a particular restaurant, customers may choose 1 of 3 types of bread, 1 of 4 different types of meat, and 2 of 5 different types of condiments. How many different sandwiches can be created at this restaurant? (Assume that the two accessories chosen must be different.)
Click here to see answer by illb1011(1) |
Question 327022: Hi I've been messing with this problem for so long now and I'm still not sure how to start with: There is a true-false quiz with 10 questions. How many possible answer keys are there if the answer to 6 questions are false and the other 9 questions are true?
In contrast, would I solve this question the same way: There is a multiple-choice test with 10 questions. 2 of the answers are A, 3 are B, 2 are C and 3 are D. How many possible answer keys are there? Thanks for the help!
Click here to see answer by Edwin McCravy(8999)  |
Question 329063: 7. A man leaves office daily at 7pm.a driver with car comes from his home to pick him from office and bring back home. One day he gets free at 5.30 and instead of waiting for driver he starts walking towards home. In the wayhe meets the car and returns home on car. He reaches home 20 minutes earlier than usual. In how much time does the man reach home usually?
(A) 1 hr 20 min (B) 1 hr (C) 1 hr 10 min (D) 55 min
Click here to see answer by galactus(183)  |
Question 329405: A bag contains 9 red balls numbered 1,2,3,4,5,7,8,9 and 6 white balls numbered 10,11,12,13,14,15. One ball is drawn from the bag. What is the probability that the ball is white, given that the ball is odd-numbered?
Click here to see answer by stanbon(57967) |
Question 329437: A bag contains 9 red balls numbered 1,2,3,4,5,6,7,8,9 and 6 white balls numbered 10,11,12,13,14,15. One ball is drawn from the bag. What is the probability that the ball is white, given that the ball is odd-numbered?
Click here to see answer by Fombitz(13828)  |
Question 330788: 1)In how many different ways can the 5 starters on the basketball team be assigned to their positions?
2)Using only the odd digits (1, 3, 5, 7, 9) how many different 3-digit numbers can you form (repetitions are allowed)?
3)The menu at the cafeteria lists 3 different sandwiches, 6 different drinks, and 5 varieties of chips. How many different sandwich/chip/drink meals are possible?
Click here to see answer by galactus(183)  |
Question 332426: You have a computer password that consists of 3 digits and 2 lowercase letters. How many passwords are there if no digit or letter can be repeated? What is the probability that you will enter the correct password?
Click here to see answer by Alan3354(31532)  |
Question 332800: a club with 10 members is to pick a president, vice president, treasurer, and secretary. If each office is to be held by one person and no person can hold 1 offices, in how many ways can those offices be filled?
Click here to see answer by jrfrunner(365)  |
Question 334375: The number of plastic straws produced by a machine varies directly as the amount of time the machine is operating. If the machine produces 20,000 straws in 8 hours, how many straws can it produce in 50 hours?
Click here to see answer by rfer(12730) |
Question 334572: When seating guests at a round table, two arrangements are considered the same if each person has the same neighbor to the left and to the right in each arrangement. What are the number of unique arrangements when seating 2,3,4, and 6 guests at a round table.
Click here to see answer by Edwin McCravy(8999)  |
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825
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