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sashie0
15.07.2020 •
Mathematics
1. A farmer can put up a fence - of a km in 1 day. What is the length of the fence that he can put up in 6 2/3 days
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Ответ:
20km
Step-by-step explanation:
Given that it takes a farmer 1 day to put up ⅓km fence, the length of fence he would put up in 6⅔ days would be calculated as follows:
Let x be length of the fence we are looking for. Thus,
⅓ km = 1 day
6⅔ = x
Cross multiply
⅓*x = 1*6⅔
⅓*x = 1*20/3
x/3 = 20/3
Multiply both sides by 3 to make x the subject of formula
x = (20*3)/3
x = 20
Length of fence he would put up in 6⅔ days = 20km
Ответ:
Possible outcomes on flipping 3 coins = 27
Probability of flipping 3 heads or HHH = 1/27
Probability of flipping 3 tails or TTT = 1/27
.
The outcome must be all head or tail so they will flip more than one.
Probability(HHH or TTT) = P(HHH) + P(TTT)
P(HHH or TTT) = 1/27 + 1/27
P(HHH or TTT) = 2/27
.
The answer is 2/27.
:)