4400 Higher November 2006 Paper 4 Q22

EdexcelHigherOld spec3 marksMultiple Events

22 Younis spins a biased coin twice.
The probability that it will come down heads both times is 0.36
Calculate the probability that it will come down tails both times.

(3)

Scheme	Marks
\(\sqrt{0.36}\) or 0.6	M1
(1 − “0.6”) × (1 − “0.6”) or 0.4 × 0.4	M1
0.16	A1
	(3)
	(3 marks)

Notes