(Solved): plaese solve this  3) You have a bag of clocks; the number of clocks in the bag is 20 and you k ...

3) You have a bag of clocks; the number of clocks in the bag is 20 and you know that 6 of them are broken. If you pick 5 clocks from the bag at random, what's the probability that 4 of them will be broken? (25 points) 4) It is known that the heights of students are normally distributed with mean value of 160 cm and standard deviation of 8 cm. If you pick two students at random, what is the probability that both of them will be shorter than 168 cm? (30 points) 2 002 41 04 05 16 26 M 6.0 50000 50399 50798 51197 52392 52790 53188 33556 51994 55962 0.1 53983 34776 55567 55172 54380 56356 37142 56349 57535 0.2 57926 56317 38706 $9095 59483 60257 59871 60642 61026 A1409 61791 6.3 62172 62930 63307 63552 63643 64058 64803 64431 4.4 60910 65542 66276 56640 670013 67364 64-439 57724 ARON2 0.5 609146 69497 30194 70540 70884 71226 71566 71904 72575 72907 73237 33565 73491 74215 74537 34857 75175 75490 77337 0.7 76730 75804 77035 78230 77935 77637 76115 76424 78524 0.3 78814 79103 79389 79673 79955 30234 80785 81057 80511 31327 82639 0.9 32894 83147 83398 33646 85083 85314 8599) 35543 82381 34849 87076 36864 36214 31859 82121 81504 1.8 54614 34375 34134 1.1 86433 M6650 13 38666 90320 90490 90638 87266 27495 37699 8:00 38294 86877 88493 39065 AV251 39435 39617 39973 90047 39796 1.3 90963 90824 31149 9109 31774 31466 31621 14 33189 82641 92973 91924 92922 32364 92221 53699 93574 34408 1.5 93319 33943 34062 $3445 93822 94520 3540 94738 35053 95154 54045 94630 94950 35254 35352 14 1.3 95543 35637 95818 95901 36327 91994 96000 36144 34246 346915 37062 56407 1.4 96456 96485 34562 96712 96638 (21) P(X) = () P'q P(X) = P(X)=> P(X)-pqf(z) - 10 LYWIT pa 56615 LO CARLE STAD