There are three cards in box A and three cards in box B. There is a number on each card.
Box A

Box B

Charles takes a card from box A and a card from box B. He multiplies the numbers on the two cards to get a total score.
Work out the probability that the total score is an odd number.
Practise OCR GCSE Maths Systematic Listing with exam-style questions for Foundation and Higher tier. 47 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.