Finding P(r ≥ 6) means there could be exactly 6 males, exactly 7 males, exactly 8 males, or exactly 9 males. Since the events are mutually exclusive, we use the addition rule. P(r≥ 6) = P(6) + P(7) + P(8) + P(9) First, use this table to find P(6) rounded to three decimal places. A portion of this table for n = 9 is displayed below. r .55 .001 .008 .041 .116 213 .260 212 .111 .034 9 .005 .010 When n = 9 and p = 0.55, we have P(6) = P .85 .90 .65 .70 .75 .80 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .000 .021 .010 .004 .001 .000 .000 .000 .074 .042 .021 .009 .003 .001 .000 .167 .118 .017 .005 .001 .074 .039 .172 .117 .066 .251 .219 .028 .007 251 272 .267 234 .176 .107 .045 .161 216 267 .300 .302 260 .172 .060 .100 .225 .302 .368 .387 .021 .075 .134 232 387 x 0 1 2 3 4 5 6 7 8 .60 .000 .004 .001 Submit Skip (you cannot come back) .156 .040 .95 .000 .000 .000 .000 .000 .001 .008 .063 .299 .630

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