Out of 180 music lovers, it was founded that 95 liked folk songs, 80 liked modern songs and 35 did not like the both types of songs. Find how many people liked both songs?

Successful implementation of a new system is based on three independent modules. module 1 works properly with probability 0.96. for modules 2 and 3, these probabilities equal 0.95 and 0.90. compute the probability that at least one of these three modules fails to work properly.

How do i do this activity, is appreciated

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28