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3 years ago

If 150g of sugar is used for 5 cakes How much is used for 7 cakes?:)

2 answers:

3 0

Well, if 150 grams is used for 5 cakes, we can divide that.
150/5=30. 30 grams of sugar are used for each cake
You want to know how many grams for 7 cakes
30x7=210 grams of sugar are used for seven cakes.
Hope this helps!

anastassius [24]3 years ago

3 0

150 g - 5 cakes
x g - 7 cakes

$x=\dfrac{7\cdot150}{5}\\
x=210$

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Now,

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$E(X)=\sum_{x=1}^{n}n\left(\begin{array}{c}n-1\\x-1\end{array}\right)p^x(1-p)^{n-x}$

Factoring out the n and one p from the above expression:

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Representing k=x-1 in the above gives us:

$E(X)=np\sum_{k=0}^{n}n\left(\begin{array}{c}n-1\\k\end{array}\right)p^{k}(1-p)^{(n-1)-k}$

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