Question

Ajay had a box containing 20 red marbles and 30 green marbles. Rajesh gave him 15 red and 5 green marbles to put in the box.then the probability of picking a red marbles from the box is​

Answer 1

Step-by-step explanation:

The total red marbles= 20+15= 35

The total green marbles= 30+5=35

So, the total no. of marbles in the box= 35+35=70

Now,

The Probability of picking red marbles from box = no. of favourable events / total no. of possible outcomes

= 35/70

= 1/2

Hope it helps!!

Answer 2

Step-by-step explanation:

$d = \frac{vt}{2}$ to hear an echo