★ Q15 — What is being recorded?
Toss three coins and record only the number of heads. Compare the source options: (i) {1,2,3}; (ii) {0,1,2}; (iii) {0,1,2,3,4}; (iv) {0,1,2,3}. Identify the valid sample space and explain every rejected option. Options appear on printed page 173.