4.1 Probability (A-level only)

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Question 120

Given that $P (A) = a$ and $P (B) = b$ , state an expression for $\cup B)$ in terms of $a$ and $b$ when: (i) $A$ and $B$ are mutually exclusive, (ii) $A$ and $B$ are independent.

[2]

In a climate study, let $H$ be the event of high humidity and $T$ be the event of high temperature. It is found that:

\cap T') = 0.22, \quad P(T) = 0.30 \quad \text{and} \quad P(H|T) = 0.6

Find the value of: $\cup T)$

[2]

$\cap T)$

[2]

$P (H)$

[2]

Given that $P (A) = a$ and $P (B) = b$ , state an expression for $\cup B)$ in terms of $a$ and $b$ when: (i) $A$ and $B$ are mutually exclusive, (ii) $A$ and $B$ are independent.

[2]

In a climate study, let $H$ be the event of high humidity and $T$ be the event of high temperature. It is found that:

\cap T') = 0.22, \quad P(T) = 0.30 \quad \text{and} \quad P(H|T) = 0.6

Find the value of: $\cup T)$

4.1 Probability (A-level only)

Question 120

Markscheme

4.1 Probability (A-level only)

Question 120

Markscheme

4.1 Probability (A-level only)

Question 120

4.1 Probability (A-level only) Questions

4.1 Probability (A-level only)

Question 120

4.1 Probability (A-level only) Questions