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2 years ago

It takes Andre 4 minutes to swim 5 laps.

Mathematics

2 answers:

soldier1979 [14.2K]2 years ago

6 0

It takes Andre 1.25 minutes to swim a lap.

lbvjy [14]2 years ago

5 0

Answer:

4/5

Step-by-step explanation:

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30 POINTS! Tanya has several different ways she likes to walk home. One route takes 20 minutes, two of the routes take 30 minute

andre [41]

Of the 5 routes Tanya can choose from, 2 routes will take 30 minutes. This means that the probability is:

2/5 = 0.4

The answer is 40%.

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2 years ago

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UkoKoshka [18]

Answer:

I was able to do 6-8 but 9 I got stumped on as well.

Step-by-step explanation:

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3 years ago

1-3/8 what's the sum of this problem

USPshnik [31]

-0.25 is the answer if you subtract 3 from 1 it -2 and if you divide that its -.25

8 0

3 years ago

An urn contains 8 red chips, 10 green chips, and 2 white chips. A chip is drawn and replaced, and then a second chip is drawn.

Harlamova29_29 [7]

Answer:

(A) 0.04

(B) 0.25

Step-by-step explanation:

Let R = drawing a red chips, G = drawing green chips and W = drawing white chips.

Given:

R = 8, G = 10 and W = 2.

Total number of chips = 8 + 10 + 2 = 20

$P(R) = \frac{8}{20}=\frac{2}{5}\\P(G)= \frac{10}{20}=\frac{1}{2}\\P(W)= \frac{2}{20}=\frac{1}{10}$

As the chips are replaced after drawing the probability of selecting the second chip is independent of the probability of selecting the first chip.

(A)

Compute the probability of selecting a white chip on the first and a red on the second as follows:

$P(1^{st}\ white\ chip, 2^{nd}\ red\ chip)=P(W)\times P(R)\\=\frac{1}{10}\times \frac{2}{5}\\ =\frac{1}{25} \\=0.04$

Thus, the probability of selecting a white chip on the first and a red on the second is 0.04.

(B)

Compute the probability of selecting 2 green chips:

$P(2\ Green\ chips)=P(G)\times P(G)\\=\frac{1}{2} \times\frac{1}{2}\\ =\frac{1}{4}\\ =0.25$

Thus, the probability of selecting 2 green chips is 0.25.

(C)

Compute the conditional probability of selecting a red chip given the first chip drawn was white as follows:

$P(2^{nd}\ red\ chip|1^{st}\ white\ chip)=\frac{P(2^{nd}\ red\ chip\ \cap 1^{st}\ white\ chip)}{P (1^{st}\ white\ chip)} \\=\frac{P(2^{nd}\ red\ chip)P(1^{st}\ white\ chip)}{P (1^{st}\ white\ chip)} \\= P(R)\\=\frac{2}{5}\\=0.40$

Thus, the probability of selecting a red chip given the first chip drawn was white is 0.40.

6 0

3 years ago

Annaly runs with a speed of 6.66.6 miles per hour. laurie runs at 7.67.6 miles per hour. they began at the same spot, and starte

kozerog [31]

The speed at which they are separating = 6.6 + 7.6 = 14.2 mph

time = distance / speed
time = 41.18 / 14.2 = 2.9 miles answer

4 0

3 years ago