Answer:
The probability of students scored less than 60 = .0768
Step-by-step explanation:
Given -
Mean score [tex](\nu )[/tex] = 70
standard deviation [tex](\sigma )[/tex] = 7
Let X be the score of students
the probability that students scored less than 60 =
[tex]P(X< 60)[/tex] Â = [tex]P(\frac{X - \nu }{\sigma}< \frac{60 - 70}{7})[/tex]
         =  [tex]P(z < \frac{60 - 70}{7})[/tex]  put[ Z= [tex]\frac{X - \nu }{\sigma}[/tex]]
          =  [tex]P(z < -1.428)[/tex]  using z table
          =  .0768
