Acoin is tossed 7 times. what is the probability that the number of heads obtained will be between 22 and 77 inclusive? express your answer as a fraction or a decimal number rounded to four decimal places.

Step-by-step explanation:

Experimeto is to throw a coin 7 times and count the number of faces obtained.

So, getting a success means getting a face.

The probability p of obtaining success is:

The probability of obtaining a failure is:

Then we have all the necessary conditions to have a binomial experiment. Therefore we use the following formula:

Where x represents the number of successes. In this case we want the probability that:

Now assuming that the desired probability is:

So:

=  

Finally

i dont get it. where are the "descriptions"?

$2416.6

step-by-step explanation:

per hour = $ 25

total work time = 35

commission = 15%

total she has to make = $ 4,500

let she sold x dollar products

so her commission will be 15 % of x

now

total = weekly basic pay + commission

4500= (25*35) + 15 % of x

4500=875 + * x

4500-875 =   * x

3625= * x

multiplying wwith 100 on both sides gives

36250 = 15 x

now

x =  

x= $2416.6