Exercise

# Calculating density of a binomial

If you flip 10 coins each with a 30% probability of coming up heads, what is the probability exactly 2 of them are heads?

Instructions

**100 XP**

- Answer the above question using the
`dbinom()`

function. This function takes almost the same arguments as`rbinom()`

. The second and third arguments are`size`

and`prob`

, but now the first argument is`x`

instead of`n`

. Use`x`

to specify where you want to evaluate the binomial density. - Confirm your answer using the
`rbinom()`

function by creating a simulation of 10,000 trials. Put this all on one line by wrapping the`mean()`

function around the`rbinom()`

function.