When ESP tests are done using Zener cards, pure guessing in these tests will produce an average score of _____ "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, pure guessing would result in an average of 5 hits (25/5 = 5).

When ESP Tests Are Done Using Zener Cards, Pure Guessing