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mina [271]
3 years ago
10

The length of a rectangle is four times its width. If the perimeter of the rectangle is 60 cm, find its area.

Mathematics
1 answer:
Naddik [55]3 years ago
3 0
W is the width
4w is the length
10w=60
w=6

the rectangle is 6 by 24
area is 144
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Two ballpoint pens are selected at random from a box that contains 3 blue pens, 2 red pens, and 3 green pens. If X is the number
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a) f(x,y) =\frac{\binom{3}{x}\binom{2}{y}\binom{3}{2-x-y}}{\binom{8}{2}} ;   x = 0, 1 , 2;  y = 0, 1 , 2; 0 ≤ x+y ≥ 2

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Step-by-step explanation:

joint probability is a function that characterizes the distribution of a random variable. If X and Y be two random variables then the joint probability will be P(X = x, Y=y)

Given Data,

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Y = The number of red Pens

a)

possible outcomes(X, Y) are (0, 0), (0, 1), (1, 0), (1, 1), (0, 2), (2,0)

Please refer fig. also

total number ways of selecting any 2 pens = \binom{8}{2}= \frac{8!}{2! 6!} =28

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3 years ago
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deff fn [24]

Answer:

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Step-by-step explanation:

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let x =5

f(5) = 3|5+11| -4

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      = 3*16 -4

    = 48 -4

   = 44

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3 years ago
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