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Alexus [3.1K]
3 years ago
10

Twelve people are given two identical speakers, which they are asked to listen to for differences, if any. Suppose that these pe

ople answer simply by guessing. Find the probability that three peo
Mathematics
1 answer:
ruslelena [56]3 years ago
7 0

Answer:

0.0537

Step-by-step explanation:

This follows a binomial distribution with : n

Number of trials 'N' = 12 ; Probability of success (difference between speakers) 'p' = 1/2 or 0.5 ; Probability of failure (no difference b/w speakers) = 1/2 or 0.5 ; No of success 'r' = 3

P (X = 3) = N C r. (p)^r.(q)^(n-r)\\

= 12C3 (0.5)^3 (0.5)^9

0.0537

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Write 3/2 as a mixed number
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Answer:

1\frac{1}{2}

Step-by-step explanation:

3/2 = 2/2 * 1/2

2/2 = 1

So 3/2 = 1\frac{1}{2}

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3 years ago
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Does 17/20 repeat or terminate
natima [27]
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3 years ago
Kiran has used `\frac{4}{5}`of the pieces in his jigsaw puzzle. He has used 120 pieces. How many pieces are in the whole puzzle?
Yuki888 [10]

Answer: 150 pieces

Step-by-step explanation:

Kiran has used 4/5 of the pieces of the puzzle.

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7 0
3 years ago
Cristiano is saving money to buy a bike that costs $189, He saved $99 so far. He plans on saving $10 each week. In how many week
yuradex [85]

Answer:

Cristiano will have enough money to buy bike in 9 weeks.

Step-by-step explanation:

Given:

Cost of the bike = $189

Money saved = $99

Money saving each week = $10

We need to find the number of weeks will he have money to buy bike.

Solution:

Let the number of weeks be 'x'.

Now we can say that;

Money saved  plus money saving each week multiplied by number of weeks is equal to cost of the bike.

framing in equation form we get;

99+10x=189

Subtracting both side by 99 using subtraction property of equality we get;

99+10x-99=189-99\\\\10x=90

Dividing both side by 10 using division property of equality we get;

\frac{10x}{10}=\frac{90}{10}\\\\x=9\ weeks

Hence Cristiano will have enough money to buy bike in 9 weeks.

7 0
3 years ago
2/7+x=17/5<br>please solve this​
kondor19780726 [428]

Step-by-step explanation:

x=17/5 - 2/7

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3 years ago
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