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3 years ago

A die is rolled twice. What is the probability of showing a 3 on the first roll and an even number on the second roll?

Mathematics

1 answer:

andreyandreev [35.5K]3 years ago

4 0

Answer:

1/6 * 1/2 = 1/12

Step-by-step explanation:

1 number on a 6 sided die is 1 out of 6 (1/6) and an even number (2,4,6) on a 6 sided die is 3/6 or 1/2 (always simplify when multiplying fractions)

so 1 times 1 = 1 and 6 times 2 = 12 making it 1/12

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Kelly watches 3/5 of a movie in 5/8 of an hour. How much time wil it take her to watch the entire movie?

iVinArrow [24]

well, putting the movie in fifths, she watched 3/5, the whole movie will be 5/5 = 1.

$\begin{array}{ccll} \stackrel{movie}{fraction}&hour\\ \cline{1-2} \frac{3}{5}&\frac{5}{8}\\[1em] \underset{whole}{1}&x \end{array}\implies \cfrac{~~ \frac{3}{5}~~}{1}=\cfrac{~~ \frac{5}{8}~~}{x}\implies \cfrac{3}{5}x=\cfrac{5}{8}\implies \cfrac{3x}{5}=\cfrac{5}{8} \\\\\\ 24x=25\implies x = \cfrac{25}{24}\implies x = 1\frac{1}{24}\qquad \textit{1 hour, 2 minutes and 30 seconds}$

4 0

3 years ago

there are 300 student and teachers at a sports event.Grade k to 2 is students: 137 Grade 3 to 5 students: 145 Teachers: ? what i

AVprozaik [17]

Answer:

Percentage of teachers = 6%

Step-by-step explanation:

Given;

Number of grade k-2 students = 137

Number of grade 3-5 students = 145

Total = 300

Number of teachers = 300 - (137+145) = 18

Percentage of teachers = (number of teachers÷total)× 100%

%T = (18/300) × 100

%T = 6%

8 0

3 years ago

How do I do this homework???

Nonamiya [84]

Step-by-step explanation:

135

/ \

3. 45

/ \

3. 15

/ \

3. 5

250

/ \

10 .25

/\ / \

2 5. 5 5

351

/ \

3. 117

/ \

3. 39

/ \

3. 13

Hope it helps :)

5 0

4 years ago

starting at home, Omar traveled uphill to the gift store for 30 minutes at just 10mph. He then travelled back home along the sam

SashulF [63]

Answer:

average speed for the entire trip is 15 mph

Step-by-step explanation:

Let x be the uphill speed and y be the downhill speed.

We have been given that

Speed of Omar in uphill to reach gift store = x =10 mph

Speed of Omar in downhill to reach his home = y = 30 mph

We know the formula for average speed for the entire trip

$\text{Average speed }=\frac{2xy}{x+y}\\\\=\frac{2\times 10\times 30}{10+30}\\\\=\frac{600}{40}\\\\=15$

Therefore, average speed is 15 mph

6 0

3 years ago

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During a 3 day street fair, 159 woman and 177 men attended. At that rate, how many more men than women will attend a 7 day stree

Stella [2.4K]

awnser: 42

step by step:

1. find the racio of both

2.multiply the awnsers by 7

3.finally subtract

3 0

3 years ago

Read 2 more answers