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3 years ago

Sophie uses 18 beads to make a neckalace , 3/6 of the beads are purple

Mathematics

1 answer:

valentinak56 [21]3 years ago

4 0

Answer:

9 beads are purple

Step-by-step explanation:

we know that

To find out how many beads are purple, multiply the total beads by the fraction of the beads that are purple

therefore

9 beads are purple

Another way to solve the problem is convert the fraction in percentage

we have

If the total are 18 beads

50% is 9 beads

therefore

9 beads are purple

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If you flip a fair coin 7 times, what is the probability that you will get exactly 4 tails?

andre [41]

Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Step-by-step explanation:

We need to find the probability that you will get exactly 4 tails, if you flip a fair coin 7 times.

This is the combination question.

The total combinations will be: 2^7=128

Now, finding number of ways we can get exactly 4 tiles:

We will use the formula:

$^nC_k=\frac{n!}{k!(n-k)!}$

in our given question, n= 7, k= 4

Putting values:

$^nC_k=\frac{n!}{k!(n-k)!}\\^7C_4=\frac{7!}{4!*3!}\\ ^7C_4=\frac{7*6*5*4!}{4!*3!}\\ ^7C_4=\frac{7*6*5}{6}\\ ^7C_4=35$

So, Probability that you will get exactly 4 tails, if you flip a fair coin 7 times is: $\frac{35}{128}$

Keywords: Probability

Learn more about Probability at:

#learnwithBrainly

7 0

3 years ago

Simplify the expression: 10s+–2s

likoan [24]

Answer:

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Terms

Step-by-step explanation:

Step 1: Define

10s + -2s

Step 2: Simplify

Rewrite: 10s - 2s
Combine like terms: 8s

3 0

3 years ago

Read 2 more answers

A moving company has one large truck for furniture and one small truck for boxes. During one move, it took the large truck 4 hou

s2008m [1.1K]

Answer:

large truck = 45miles small truck = 60miles

Step-by-step explanation:

180/4 and 180/3

4 0

4 years ago

Drag each tile to the correct box.

Stolb23 [73]

Answer:

Step-by-step explanation:

5 0

3 years ago

What is 50 percent of 62?

stepan [7]

Answer:

Step-by-step explanation:

An entire amount is 100% of the amount.

50% is half of 100%, so 50% means the same as half.

Half of 62 is the same as 62/2 = 31

Answer: 31

6 0

4 years ago

Read 2 more answers