Page 157 - Math Grade 12 (Advance)

PROEUS DARA
6 4
P(X = 6) = C(IO, 6) X (0.75) (0.25) = 0.1460
7 3
P(X = 7) = C(l 0, 7) x (0.75) (0.25 ) = 0.2503
3
P(X = 8) = C(IO, 8) X (0.75h0.25) = 0.2816
9
P(X = 9) = C(lO, 9) x (0.75) (0.25) = 0.1877
10 0
P(X = 10) = C(lO, 10) x (0.75) (0.25) = 0.0563

P(X>5) = 0.1460+0.2503+0.2816+0.1877+0.0563 = 0.9219

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!JJ'Uf'lfif.'i/ : m X ctUW:lHS Bin(n, 0.6) t'Ulru P(X < 1) = 0.0256 '1 ?lrulSltlt~ n '1
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Gtl:!II'JJ : fil'e!U'e&'in'e X- Bin(n, 0.6) t'Ul ru P(X < l) = P(X = 0) = 0.0256 ( 1)
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0 n-0 O n
P(X = 0) = C(n, 0) X (0. 6 ) (0.4) = ( .4) (2)

m-egmfigsb (1) ab (2) ti!101S!U~fil~ 0.0256 = (0.4)"

log(0.0256) = nlog(0.4)
-1.592 = n(-0.398) Y. n = ~:;~~

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152