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3 years ago

What is a rational number?

2 answers:

8 0

Answer: A rational number is a number that can be expressed as the quotient (i.e. ratio or fraction) of two integers.

Step-by-step explanation: Integers are rational since any integer, n ,can be written as n/1 )Rational numbers are numbers that can be expressed as fractions whereas irrational numbers cannot be expressed as fractions A rational number is a number that terminates or ends. As in a perfect square like: 144; 36; 625 etc.More specifically, a rational number is a number that can be expressed as the ratio of two integers, where the denominator is not zero. 1.37, for instance, is rational because it can be expressed as 137 / 100.It is any whole number even if it's a negative number Any number that can be expressed as a fraction is a rational number whereas irrational numbers can't be expressed as a fractions.In mathematics, a rational number is any number that can be expressed as the quotient or fraction p/q of two integers, p and q, with the denominator q not equal to zero. Since q may be equal to 1, every integer is a rational number.

Sever21 [200]3 years ago

3 0

Step-by-step explanation:

A rational number is any number that can be divided (written as a fraction) by.

Examples: 1/2, 3, 5/9

*Irrational numbers: cannot be divided

Examples: π, 3.53465374765768957965...

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Ok so, 67 out of 206 species of birds found in the Badlands nest there. 824 species were found in the Badlands. How many of thos

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Step-by-step explanation:

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3 years ago

to find the probability of flipping heads at least once if you flip a coin two times. The possible outcomes (we don't care about

nikitadnepr [17]

Answer:

The probability of flipping Heads at least once is $\frac{3}{4}$ .

Step-by-step explanation:

The probability of an event, say E, is the ratio of the favorable outcomes to the total number of outcomes, i.e.

$P (E) = \frac{Favorable\ outcomes}{Total\ outcomes}$

The sample space of flipping two coins is:

S = {HH, HT, TH and TH}

Total number of outcomes = 4

Compute the probability of flipping Heads at least once as follows:

Let X = heads.

P (X ≥ 1) = P (X = 1) + P (X = 2)

$=\frac{2}{4}+\frac{1}{4} \\=\frac{3}{4}$

Thus, the probability of flipping Heads at least once is $\frac{3}{4}$ .

The experiment of flipping a coin is a binomial experiment.

Since there are only two outcomes of the experiment, either a Heads or a Tails.

So if X is defined as the number of heads in n flips of a coin then the random variable X follows a binomial distribution with probability p = 0.5 of success.

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3 years ago