All categories

4 years ago

Find the probability of throwing a sum of 10 at least 9 times in 10 throws of a pair of fair dice.

1 answer:

5 0

So the possible ways of throwing a sum of 10 is 4&6, 5&5, 6&4. All possible ways of throwing a pair of dice equal 36, so divide 3 by 36. Then, divide this number by 9 to get the possibility of it being at least 9 times, because the last throw doesn't affect it.

You might be interested in

What is the value of x<br> (5x+1) =45

Lelechka [254]

Answer:

x=8

Step-by-step explanation:

3 0

3 years ago

while only 5% of babies have learned to walk by the age of 10 months, 75% are walking by 13 months. if the age at which babies d

7nadin3 [17]

Answer:

$mu=12.1299$

$\sigma=1.2987$

Step-by-step explanation:

In the normal distribution curve, we will have 5% below 10 months [horizontal axis] and 75% below 13 months [horizontal axis].

We need to find z-score using z-table [normal table] that corresponds to

5% = 0.05

and

75% = 0.75

Zscore formula:

$z=\frac{x-\mu}{\sigma}$

Where mu is mean and sigma is standard deviation [these are the 2 parameters we are seeking]

So, 0.05 corresponds to z = -1.64, and

0.75 corresponds to z = 0.67

Now we put both of these into z-score formula and solve both equations for mu and sigma.

$-1.64=\frac{10-\mu}{\sigma}$

and

$0.67=\frac{13-\mu}{\sigma}$

The first equation becomes:

$-1.64=\frac{10-\mu}{\sigma}\\-1.64\sigma+\mu=10\\mu=10+1.64\sigma\\$

Now, simplifying 2nd equation and putting this in:

$0.67=\frac{13-\mu}{\sigma}\\0.67\sigma=13-(10+1.64\sigma)\\0.67\sigma=13-10-1.64\sigma\\2.31\sigma=3\\\sigma=1.2987$

Now finding mu:

$\mu=10+1.64(1.2987)\\\mu=12.1299$

These two MU(mean) and SIGMA(standard deviation) are the 2 parameters.

4 0

3 years ago

X/x-2 + x-1/x+1 = -1 Can someone please help?

GREYUIT [131]

Wait let me make it i will be back soon

6 0

4 years ago

Jamine has a half-sheet cake. If she has six friends, how much will each one get?

laila [671]

Answer:

1 12th (1 over 12)

Step-by-step explanation:

If she had a whole cake it would be 1 6th (1 over 6) of the cake. To get the answer for this do fraction for the amount of food then multiply that by 1 as the numerator and the number of people as the denominator (1 over the # of people). Then the fraction you get as your answer from multiplying that is the fraction or answer to your question. Note this only works with these types of questions. I really hope this helps.

4 0

3 years ago

John spent half of his weekly allowance

Citrus2011 [14]

Answer:

Step-by-step explanation:

5 0

3 years ago