A phone company offers two monthly charge plans. In Plan A, the customer pays a monthly fee of

Mathematics

2 answers:

Softa [21]3 years ago

7 0

Yes the answer is plan a indeed it will be less than 300

Lina20 [59]3 years ago

4 0

Plan A will cost less than B when it's less than 300 minites

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Sever21 [200]

No a repeating decimals have number repeating such as 555555.

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3 years ago

If you draw four cards at random from a standard deck of 52 cards, what is the probability that all 4 cards have distinct charac

mezya [45]

There are $\binom{52}4$ ways of drawing a 4-card hand, where

$\dbinom nk = \dfrac{n!}{k!(n-k)!}$

is the so-called binomial coefficient.

There are 13 different card values, of which we want the hand to represent 4 values, so there are $\binom{13}4$ ways of meeting this requirement.

For each card value, there are 4 choices of suit, of which we only pick 1, so there are $\binom41$ ways of picking a card of any given value. We draw 4 cards from the deck, so there are $\binom41^4$ possible hands in which each card has a different value.