Question

the probability of getting a non faulty calculator in a lot of 500 is 0.3 find the number of faulty calculator​

Answer 1

Answer:

150

Step-by-step explanation:

It is very simple

P(e)= Number Of faulty calculators/Total Number Of calculators = 3/10

And total number Of calculators =500

Therefore, x/500 =3/10

Where x=the number Of faulty calculators

x= (3 x 500)/10=150

Answer 2

Given,

The total number of calculators in the lot$\[ = 500\]$

The probability of getting a non-faulty calculator$\[ = 0.3\]$

Solution,

Assume that the number of faulty calculators is $\[x.\]$

Therefore,

$\[\begin{array}{l} \Rightarrow \frac{x}{{500}} = 0.3\\ \Rightarrow x = 500 \times 0.3\\ \Rightarrow x = 150\end{array}\]$

Hence, the number of faulty calculators are $\[150.\]$