The ratio of neon fish to all the fish in the aquarium is 3 : 4 .
In the question ,
it is given that
in Mrs. Jone's class room there are angel fish and neon fish
number of angel fish in the aquarium = 14 fish
number of neon fish in the aquarium is = 42 fish
So, the total number of fish in the aquarium = number of angel fish + number neon fish
total number of fish = 14 + 42
= 56
the ratio of neon fish to all the fish in the aquarium is
= number of neon fish : total number of fish
= 42 : 56
since the ratio is written in simplest form ,
we get
= 6 : 8
= 3 : 4
Therefore , The ratio of neon fish to all the fish in the aquarium is 3 : 4 .
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Option C: np is the expression used for calculating the mean of a binomial distribution.
Explanation:
From the options, we need to determine the expression that is used for calculating the mean of a binomial distribution.
<u>Option A: npq</u>
The variance of the binomial distribution can be calculated using the expression npq.
Hence, Option A is not the correct answer.
<u>Option B: </u><u></u>
The standard deviation of the binomial distribution can be calculated using the expression
Hence, Option B is not the correct answer.
<u>Option C: np</u>
The mean of the binomial distribution can be calculated using the expression np
Hence, Option C is the correct answer.
<u>Option D</u>:
The mean of the binomial distribution cannot be determined using the expression
Hence, Option D is not the correct answer.
Answer:
The second one.
Step-by-step explanation:
The hollow dots represent > or < depending the direction of the arrow. The filled dots represent less than or equal to. So the second.
Answer:
x = 11
Step-by-step explanation:
x + 2(2x-2) = 51
x + 4x - 4 = 51
5x - 4 = 51
5x = 55
x = 11