Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{3}{10}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=6\).

Find \(\displaystyle P(X=r)\).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{2}{5}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=3\).

Find \(\displaystyle P(X=r)\).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{2}{5}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=3\).

Find P(X>r).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{1}{2}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=4\).

Find P(X>r).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{1}{2}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=4\).

Find E(X).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{3}{5}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=5\).

Find E(X).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{3}{5}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=5\).

Find Var(X).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.

Maths4U Original · Short practice

Independent trials have success probability \(\displaystyle \frac{1}{5}\). X is the trial number of the first success, starting at 1. Let \(\displaystyle r=6\).

Find Var(X).

Enter one number or fraction. Use at least six decimal places when needed; a distribution calculator may be used for probabilities.