Suppose there are n students in a class what is the probability at least two students have same birthday

2 answers:

5 0

I don't have enough info to solve this

5 0

P(at least two have same birthday) =
1 - (1/2)^(n).

Since no specific number of students is given, we only get an expression.

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jasenka [17]

The number is 21 because 2 is 1 doubled, and 2+1 is 3.

6 0

2 years ago

stepladder [879]

First, multiply the top equation by 2 and bottom by -3.
60x+60y=900
-60x-75y=-1035
————————
-15y=-135
—————-
-15=-15
y=9

So the answer should be 9.

6 0

2 years ago

ratelena [41]

Hi, what exactly is the question ?

3 0

2 years ago

sesenic [268]

This is a one-step equation. All you need to do is multiply the 2.5 over to the 20 to get x by itself. x=50 Hope this helps!

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3 years ago

Viefleur [7K]

$\frac{ - 1}{5} (x - 4) = - 2$
ANSWER
$x = 14$

4 0

2 years ago