When ESP tests are done using Zener cards,pure guessing in these tests will produce an average score of how many "hit(s)" out of 25 cards?
A) one
B) three
C) five
D) seven

Question

Quizplus · Accepted Answer

Zener cards have five different symbols, so the probability of guessing the correct symbol by chance is 1 in 5. Therefore, out of 25 cards, the expected number of hits by pure guessing is 25/5 = 5.

When ESP Tests Are Done Using Zener Cards,pure Guessing in These