A farmer had 140 eggs he sold 45% of them how many eggs did he sell

Mathematics

2 answers:

Minchanka [31]3 years ago

7 0

$45\% \: of \: 140 =$

$140 \div 100 \times 45 =$
$63$

Mariulka [41]3 years ago

5 0

140 x 0.45 (45% as a decimal) = 63

Answer: 63 eggs.

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Find the probability that of 25 students, no two have the same birthday

Gwar [14]

Assuming no student was born on Leap Day, and that birthdays are as likely to occur on one day as any other, each student has $\dfrac1{365}$ probability of being born on a particular day. So if one student's birthday was, say, 1 January, the probability that another student was born on 2 January is $\dfrac{364}{365}$ .

The probability, then, of having the next student born on 3 Januaray is $\dfrac{363}{365}$ .

Continuing in this fashion, for 25 students you would find that no two share a birthday with probability

$\dfrac{364}{365}\times\dfrac{363}{365}\times\cdots\dfrac{341}{365}=\dfrac{365!}{(365-25)!365^{25}}\approx0.4313$