A coin lands on heads 200 times

the relative frequency of heads is 0.4

The number of times coin thrown was 500.

Step-by-step explanation:

Relative / frequency=/frac{Number / of / lands / on / heads}{Number / of / times / coin / thrown}

0.4=/frac{200}{x}

By cross multiplying we get:

0.4x=200

Dividing both sides by 0.4 we get:

x=500.