Add: -14/15+10/21
give your answer as a reduced fraction

-16/35

Step-by-step explanation:

To know tha answer for this, you have to find the prime factor of 15 and 21:

Prime factor of 15: 3, 5

Prime factor of 21: 3, 7

Therefore, the LCD (least common denominator) of 15 and 21 are: 3 * 5 * 7 = 105

-14/15+10/21  

= -14*7/15*7 + 10*5 / 21*5

= -98/105 + 50/105

= -48/105

Simplify:

= -16/35

Hope this help you :3

the answer   is 200

step-by-step explanation:

this is a problem about poisson probabilities.   i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.  

here's how you can see a poisson distribution coming.   when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution.   this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot.   there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything.   the form of the distribution is

  probability of n chips = {[e^(-x)]*(x^n)} / (n! )

0.50 , 0.75

step-by-step explanation: