Suppose that we ask n randomly selected people whether they share your birthday. a. Give an expression for the probability that no one shares your birthday (ignore leap years). b. How many people do we need to select so that the probability is at least .5 that at least one shares your birthday?

n = 253 people

Step-by-step explanation:

There are 'n' persons and at least one person should share your birthday, the probability is given by

1 - (364/365)^n

We want this probability to be at least 0.5

Therefore, 1 - (364/365)^n ≥ 0.5

It mathematically becomes:

(364/365)^n ≥ 0.5

Taking In of both sides

In(364/365)^n ≤ In(0.5)

n.In(364/365) ≤ In (0.5)

Therefore,

n ≥ In 0.5/In 364/365

n ≥ 252.652

n = 253

Which implies we need at least 253 people.

answer: 323 is how many she has ☃☃⛄❄

step-by-step explanation:

given : the shape of his satellite can be modeled by   where x and y are modeled in inches.

now,the given equation   is a equation of parabola.

here, coefficient of x is positive, hence the parabola opens rightwards.

on comparing this equation with standard equation , we get

in standard equation, coordinates of focus=(0,m)

thus for given equation coordinates of focus=(0,1.5)

step-by-step explanation: