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3 years ago

Oliver read for 450 minutes this month. His goal is to read for 10% more minutes next month.

Mathematics

1 answer:

Delicious77 [7]3 years ago

8 0

Answer:

945 minutes.

Step-by-step explanation:

10% = 0,1

450 + 450 · 0,1 = 495 (minutes) - Oliver will read next month.

450 + 495 = 945 (minutes) - he read in all during the two months.

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3 years ago

A bucket contains 40 red balls, 25 black balls, and 35 white balls. Two balls are drawn at random. What is the probability that

Lyrx [107]

Answer:

$Probability = \frac{1}{5}$ or $Probability = 0.2$

Step-by-step explanation:

Given

$Black = 25$

$White = 35$

$Red = 40$

Required

Determine the probability of selecting Black and Red

First, we need to calculate the number of red and black balls

The probability is calculated as thus:

$Probability = P(Black\ and \ Red) \ or\ P(Red\ and \ Black)$

Convert to mathematical expressions

$Probability = [P(Black) *P(Red)] + [P(Red) *P(Black)]$

Solve for each probaility;

$P(Black) = \frac{Black}{Total} = \frac{25}{100}$

$P(Red) = \frac{Red}{Total} = \frac{40}{100}$

So, we have:

$Probability = [P(Black) *P(Red)] + [P(Red) *P(Black)]$ $Probability = [\frac{25}{100} *\frac{40}{100}] + [\frac{40}{100} *\frac{25}{100}]$

$Probability = [\frac{1000}{10000}] + [\frac{1000}{10000}]$

$Probability = [\frac{1}{10}] + [\frac{1}{10}]$

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$Probability = \frac{2}{10}$

$Probability = \frac{1}{5}$

$Probability = 0.2$

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3 years ago