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notsponge [240]
3 years ago
13

Determine whether quantities vary directly or inversely and find the constant of variation.

Mathematics
1 answer:
gtnhenbr [62]3 years ago
6 0

Answer:

8.75

Step-by-step explanation:

35/4=8.75

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A card is selected at random from an ordinary deck of 52 cards. What is the probability that it is either an ace or a spade
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Answer: 4/13

Step-by-step explanation:

Number of cards in a deck = 52

Number of spades = 13

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Probability of either a spade or an ace :

P(spade or ace) = P(spade U ace)

P(spade U ace) = p(spade) + p(ace) - p(spade n ace)

Probability = required outcome / Total possible outcomes

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= 13/52 + 4/52 - 1/52

= 16 / 52 = 4 /13

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