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Probability & Statistics › Probability basics

0/0 this session +0 XP
Numeric Easy complement ~55s

The probability it rains tomorrow is 0.3. What is the probability it does not rain?

Fractions, decimals and π are all understood.

Hints are free to take and they are counted. A correct answer after two hints moves your mastery less than one without — which is the honest way to score it.

Why this question? this skill is new to you; it consolidates something easier; and it needs calibrating — few people have tried it Predicted chance you get it: 62% — the selector aims at 78%.
difficulty fit 0.353
skill need 0.75
review boost 0
calibration bonus 0.12
recency penalty 0
repetition penalty 0
frustration 0