In a game the player wins if he rolls a 6 on a number cube. if the number cube is rolled 18 times, then what is a reasonable prediction for the number of unsuccessful rolls?

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.

is this part of a question or something