Probability using permutations and combinations
Grade 11 Math Worksheet - Building Confidence
Circle the best answer, or write your answer on the line.
AE, AR, AS, AT, ER, ES, ET, RS, RT, ST. Luz draws 2 of the 5 letter tiles A, E, R, S and T from a bag at random, without putting the first back. What is the chance both tiles are vowels, in simplest form?
MO, MP, MC, MT, OP, OC, OT, PC, PT, CT. Noah draws 2 of 5 topping slips, M, O, P, C and T, from a bag at random, without putting the first back. What is the chance C (corn) is one of them?
PL, PA, PN, PE, PT, LA, LN, LE, LT, AN, AE, AT, NE, NT, ET. Ren draws 2 of the 6 letter tiles P, L, A, N, E and T from a bag at random, without putting the first back. What is the chance neither tile is a vowel?
Tala draws all 4 name slips of a relay team from a hat at random, without putting any back, to set the running order. What is the chance the order is alphabetical, in simplest form?
Zee's new locker code is 3 different digits from 1 to 5, set at random. What is the chance a friend guesses it on the first try, in simplest form?
Bo's bike lock code is 2 different letters from A to F, in order, set at random. What is the chance one guess opens it, in simplest form?
Esme puts 5 different books on a shelf in a random order. What is the chance they end up in order of height, shortest first, in simplest form?
Jun's teacher picks 2 of 6 songs at random for the warm-up. What is the chance the 2 picks are the 2 newest songs, in simplest form?
Kira's class of 7 picks 2 students at random to water the plants. What is the chance the 2 who sit by the window are picked, in simplest form?
Luz chooses 3 of 6 books at random for a reading box. What is the chance the 3 chosen are the 3 poetry books, in simplest form?
