Answer:640
Step-by-step explanation:
Since 15 out of every 75 fish are more than 30 cm long, the probability of finding a fish more than 30 cm is P(x > 30) = 15/75 = 1/5.
The probability of finding a fish 30 cm or less is P(x ≤ 30) = 1 - P(x > 30)
= 1 - 1/5
= (5 - 1)/5
= 4/5
Since we have 800 fish and the probability of finding a fish 30 cm or less is P(x ≤ 30) = 4/5, then the number of fish in the population that are 30 cm or less in length are 800 × P(x ≤ 30) = 800 × 4/5
= 160 × 4
= 640
So, 640 fish in the population are 30 cm or less in length
Answer:
6,120,600
Step-by-step explanation:
7x + 7 = 112
7x = 105
x = 15
4y + 112 = 180
4y = 68
y = 17
answer is A.
x = 15, y = 17
Answer:
LCM(21,25) = ( 21 × 25) / 1
LCM(21,25) = 525 / 1
LCM(21,25) = 525
Step-by-step explanation:
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