# The accompanying

The accompanying table gives the probability distribution of the number of courses randomly selected student has registered
Number of courses 1 2 3 4 5 6 7
Probability 0.02 0.03 0.1 0.3 0.4 - 0.01 respectively.

a) Find the probability of a student registering 6 courses
b) What is the probability that a randomly selected student has registered at least 5 courses

Correct result:

p1 =  0.4
p2 =  0.71

#### Solution:

${p}_{1}=0.4=\frac{2}{5}$
${p}_{2}=0.3+0.4+0.01=\frac{71}{100}=0.71$

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