Given a poisson random variable x, where the average number of successes occurring in a specified interval is 1.8, then p(x = 0) is:
-1.8
-1.3416
-0.1653
-6.05

0.1653

Step-by-step explanation:

The Poisson distribution formula for probability is given by :-

, where = mean of the distribution and  x is the number of successes .

Given a Poisson random variable X, where the average number of successes occurring in a specified interval is 1.8.

i.e.

Then,

Put value of e= 2.71828

Hence, the correct answer is 0.1653  .

step-by-step explanation:

not sure about this one man

percentage - 25%

probability - 0.25

we know,

total amount of students in class = 20

total boys = 10

total girls = 10

no of girls who wear glasses = 10/2 = 5

probability of choosing a girl with glasses is =

number of girls wearing glasses/total number of students in the class = 5/20

thus, percentage of selecting a girl wearing glasses will be

= 5/20 × 100

= 5 × 5

25%

therefore,

probability will be 0.25

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