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mckinzirauch9
21.06.2019 •
Mathematics
Suppose you just purchased a digital music player and have put 8 tracks on it. after listening to them you decide that you like 4 of the songs. with the random feature on your player, each of the 8 songs is played once in random order. find the probability that among the first two songs played (a) you like both of them. would this be unusual? (b) you like neither of them. (c) you like exactly one of them. (d) redo () if a song can be replayed before all 8 songs are played.
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Ответ:
see explanation
Step-by-step explanation:
let the two consecutive odd numbers be n and n + 2 , then
n + n + 2 = 148 , collect like terms
2n + 2 = 148 ( subtract 2 from both sides )
2n = 146 ( divide both sides by 2 )
n = 73
n + 2 = 73 + 2 = 75
The 2 numbers are 73 and 75
let width be w then length = 2w - 6
The perimeter (P) is calculated as
P = 2(width + length) , then
2(w + 2w - 6) = 54 ( divide both sides by 2 )
w + 2w - 6 = 27 , collect like terms
3w - 6 = 27 ( add 6 to both sides )
3w = 33 ( divide both sides by 3 )
w = 11
2w - 6 = 2(11) - 6 = 22 - 6 = 16
length = 16 in and width = 11 in