Gce Model Questions Vol1 2020 Computer Studies Question 15

A company of 200 employees enforces a password policy that requires a minimum of 8 characters, at least one uppercase letter, one digit and one special character. An audit finds that 30 % of the employees use passwords that satisfy the length requirement but lack a special character, while 10 % use passwords that meet all the stated criteria. The remaining employees use passwords that fail the length requirement. The company plans to add an additional requirement of at least two digits, while assuming the same distribution of compliance for the other criteria. To reduce the proportion of weak passwords (those failing any criterion) to below 15 %, what is the minimum number of employees who must change their passwords to satisfy the new policy?