$C^{42}_4=\dfrac{42!}{4!(42-4)!}=\dfrac{42!}{4!\cdot 38!}=\dfrac{38!\cdot 39\cdot 40\cdot 41\cdot 42}{2\cdot 3\cdot 4\cdot 38!}=39\cdot 10\cdot 41\cdot 7=111,930$

different ways to select the four numbers between 1 and 42. Only one of this ways is correct (successful to win).

There are 30 different ways select the single number between 1 and 30. Only one of them is correct.

The probability of winning the jackpot is

$\dfrac{1}{111,930}\cdot \dfrac{1}{30}=\dfrac{1}{3,357,900}$

4 0

3 years ago

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to find the final cost of the shoes, the $15 coupon can be applied first and then the 20% discount, or the 20% discount can be a

guapka [62]

First apply 20% discount then applied $15 coupon combination gives better deal.

As given in the question,

Let final cost of the shoes be $100

First apply $15 coupon then applied 20% discount

100-15=$85

Now, 20% of 85= (20/100) × 85

=$17

Final price, 85 - 17 =$68

First apply 20% discount then applied $15 coupon

Now, 20% of 100= (20/100) × 100

=$20

100-20 = $80

Apply coupon $15

Final price, 80 - 15 =$65

Therefore, first apply 20% discount then applied $15 coupon combination gives better deal.

Learn more about discount here

brainly.com/question/3541148

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8 0

2 years ago

Which equation describes the line with a slope of 5 and y-intercept of -3

matrenka [14]

Answer:

Step-by-step explanation:

4 0

3 years ago

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