Question

Probability of accidents on a road in one hour is 3/4. What is the probability of accidents in half hour?

Answer 1

If probability of getting accident in 60min is 3/4

Then in 1min it is 3/4×1/60

In 30 min 3/4×300/600/

=3/8

Answer 2

Answer:

Explanation:

Concept:

Probability of accidents Occuring in one hour is 3/4.The probability of accidents Occuring in 30 mins has to be found. Since the time interval is halved, the given probability is divided by 2. Hence we get the probability of accidents occuring in 30 mins as 3/8.

Given:

The probability accidents on a road in one hour=$\frac{3}{4}$

To Find:

Probability of accidents in half hour=?

Solution:

Step 1:

One hour=$\frac{3}{4}$

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

∴ For half hour let us assume $\frac{1}{2}$

$\frac{1}{2}$=x

Step 2:

On cross multiplying

1×x=$\frac{1}{2}$×$\frac{3}{4}$

x=$\frac{3}{8}$

∴ Probability of getting accidents in half hour =$\frac{3}{8}$

#SPJ3