2 years ago

Need the answer quick!

Mathematics

1 answer:

elena-s [515]2 years ago

5 0

I think your answer is B. Tell me if its wrong :)

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A lottery game has balls numbered 1 through 15. What is the probability of selecting an even numbered ball or a 13?

LiRa [457]

Answer:

8 / 15

Step-by-step explanation:

Sample space = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15}

Required outcome :

Even numbers = (2, 4, 6, 8, 10, 12, 14) or 13

Total required outcomes = 8

Probability = required outcome / Total possible outcomes

P(even number or 13) = 8 / 15

4 0

2 years ago

How do you rearrange the formula for the variable indicated:

PSYCHO15rus [73]

Watch closely. I'll try to go slow:

You said v² = 2 g t

Divide each side by 2g : v² / 2g = t

Did you follow that ?

6 0

3 years ago

Laura's piano teacher estimated that her monthly piano practice should take her 4 3/4 hours per week. Laura said that last week

GREYUIT [131]

Answer:

432

Step-by-step explanation:

60 minutes is one hour

60 times 4=240

=240+192=432

5 0

2 years ago

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A circular running track is 1/2 mile long. Elena runs on this track, completing each lap in 1/10 of an

fomenos

The answer might be wrong but

3 0

2 years ago

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The sum of an infinite geometric series is three times the first term. Find the common ratio of this series.

adelina 88 [10]

Answer:

$\frac{2}{3}$

Step-by-step explanation:

The sum of an infinite geometric series is expressed according to the formula;

$S_\infty = \dfrac{a}{1-r}$ where;

a is the first term of the series

r is the common ratio

If the sum of an infinite geometric series is three times the first term, this is expressed as $S_\infty = 3a$

Substitute $S_\infty = 3a$ into the formula above to get the common ratio r;

$3a = \dfrac{a}{1-r} \\\\$

$cross \ multiply\\\\3a(1-r) = a\\\\3(1-r) = 1\\$

open the parenthesis

$3 - 3r = 1\\\\$

subtract 3 from both sides

$3 - 3r -3= 1-3\\\\-3r = -2\\\\r = \frac{2}{3}$

Hence the common ratio of this series is $\frac{2}{3}$

3 0

3 years ago