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bonufazy [111]
3 years ago
9

Krishna bought a mobile phone for Rs10,000 and sold it at Rs. 12,000. Find his grain or loss %​

Mathematics
2 answers:
Sedaia [141]3 years ago
5 0

Answer: The profit percent is 20%

Step-by-step explanation:

CP = Rs 10,000

SP = Rs 12,000

so

Profit% = (12,000-10,000)/10,000 * 100%

          = 2,000/10,000 * 100%

          = 1/5 * 100%

          = 20%

Evgesh-ka [11]3 years ago
4 0

Answer:

2000 gain

Step-by-step explanation:

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That is, the first equality follows from the law of total probability, with the sum taken over <em>y</em> from {0, 5, 10, 15}. Each probability Pr(<em>X</em> = <em>x</em>, <em>Y</em> = <em>y</em>) is given in the table to be 0.0625.

Similarly, the marginal distribution of <em>Y</em> is

Pr(<em>Y</em> = <em>y</em>) = 0.25

(b) Yes, they're independent because

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E[<em>Y</em>] = 7.5

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V[<em>X</em>] = E[<em>X</em>^2] - E[<em>X</em>]^2

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V[<em>Y</em>] = 31.25

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Answer:

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