Question

Tolong bantu yaaa..thx :) no.4,5,6

Answer 1

4.

A.
12 boys 28 girls
Total = 40 humans
(i)
P(One Boy) = 12/40 = 3/10
(ii)
P(One Girl) = 28/40 = 7/10

B.
One girl leaves the class
12 boys 27 girls
Total = 39 humans
(i)
P(One Boy) = 12/39 = 4/13
(ii)
P(One Girl) = 27/39 = 9/13

5.
Possible Outcome:
(Head,Head) (Head,Tails) (Head,Tails) (Tails,Tails)

A. Chance for two tails = 1/4
B. Chance for head, tails = 2/4 = 1/2

6.
INDEPENDENT -> 11 letters

A.

(i) P(P) = 1/11
(ii) P(E) = 3/11
(iii) P(Vowel) = 4/11
(iv) P(Consonant) = 7/11

B.
Letter E removed, then it's INDPENDENT -> 10 letters

(i) P(P) = 1/10
(ii) P(E) = 2/10 = 1/5
(iii) P(Vowel) = 3/10
(iv) P(Consonant) = 7/10

Semoga membantu :)

Answer 2

No 4
number of students in class --> 12 + 28 = 40
a (i) 12/40 = 3/10
  (ii) 28/40 = 7/10
b 
number of students in class --> 12 + 27 = 39
(i) 12/39 = 4/13
(ii) 27/39 = 9/13

5
a. two tails --> 1/4
b. head and a tail --> 2/4 --> 1/2

6. INDEPENDENT --> 11 letters (1I, 3N, 2D, 3E, 1P,1T)
a
(i) 1/11
(ii) 3/11
(iii) 4/11
(iv) 7/11

b letters left in the box --> 10 letters (1I, 3N, 2D, 2E, 1P,1T)
(i) 1/10
(ii) 2/10
(iii) 3/10
(iv) 7/10