CUET Preparation Today
The probability that a teacher will give an unannounced test during any class meeting is 1/5. If a student is absent twice, the probability that the will miss at least one test is: |
7/25 9/25 16/25 24/25 |
9/25 |
P (teacher misses at least 1 test) = 1 - P (misses no test) = 1 – P (both days test was not given) = $1-\frac{4}{5}×\frac{4}{5}=\frac{9}{25}$ |
