Refer to the International Journal of Production Economics (Vol. 172, 2016) study of U.S. military jamming attacks on wireless networks used by terrorists, Exercise 2.8 (p. 49). Recall that 80 recent jamming attacks were classified according to network type (WLAN, WSN, or AHN) attacked and number of channels (single- or multi-channel) of the network. The results are reproduced in the accompanying table.
a. Find the probability that a recent jamming attack involved a single-channel network.
b. Find the probability that a recent jamming attack involved a WLAN network.

Transcribed Image Text:

Network Type/Number of Channels Number of Jamming Attacks WLAN / Single WSN / Single AHN / Single WLAN / Multi WSN / Multi AHN / Multi 31 13 14 TOTAL: 80