After growing tired of squinting while driving, Bella went shopping for a pair of sunglasses. She tried on glasses with different frames and lenses. The probability that a pair of sunglasses has wayfarer frames is 0.6, the probability that it has regular lenses is 0.18, and the probability that it has wayfarer frames and regular lenses is 0.07. What is the probability that a randomly chosen pair of sunglasses has wayfarer frames or regular lenses? Write your answer as a whole number, decimal, or simplified fraction.

To find the probability that a randomly chosen pair of sunglasses has wayfarer frames or regular lenses, we need to calculate the union of these two events.

Let's denote the event of having wayfarer frames as W, and the event of having regular lenses as R.

The probability of having wayfarer frames is P(W) = 0.6.

The probability of having regular lenses is P(R) = 0.18.

The probability of having wayfarer frames and regular lenses is P(W ∩ R) = 0.07.

To find the probability of the union of these two events, we can use the formula:

P(W ∪ R) = P(W) + P(R) - P(W ∩ R)

Plugging in the given values, we have:

P(W ∪ R) = 0.6 + 0.18 - 0.07 = 0.71

Therefore, the probability that a randomly chosen pair of sunglasses has wayfarer frames or regular lenses is 0.71.