Refer to Exercise 5. Suppose 10 circuits are constructed. Find the probability that 8 or more have voltages less than 200 volts.

Refer to Exercise 5.

If a resistor with resistance R ohms carries a current of I amperes, the potential difference across the resistor, in volts, is given by V = IR. Suppose that I is lognormal with parameters μ_I = 1 and σ²_I= 0.2, Ris lognormal with parameters μ_R = 4 and σ²_R= 0.1, and that I and R are independent.