KCSE 2021 PROBABILITY QUESTION.

[fokokoster]

Kindly check part b.., once the first student is picked the number reduces by 1, that is picking without replacement.

[monicahwangoi]

Part b should be p(f1, f4)+p(f4, f1) if you sum them you will get 24/199
ii) p(f4, f1, wears glasses)=21/9950

[najmadiriye]

Great teacher ❤❤ love from 🇰🇪🇰🇪kajiado

[PatrickLemuya-fs]

it is not 800 teacher, the total number of student in the school are 200 instesd of 800.

[dr.tr.oscarngatia.W.O.laod]

Hello my brother? Congratulations to the good work... My question is, the probability of picking a form one and form four, would it not be 60/200 × 40/199 + 49/200 × 60/199 ???

[victorogalo]

Good attempt. According to me these are the answers (a.) (1) Ans = 40/200 = 1/5 = 0.2 (a.) (11) Ans = 31/200 = 0.155 (b.) For this part, we need to consider the total number of students, which is 200. When selecting two students, we assume they are chosen without replacement. (b.)(1)Ans = 24/199 = 0.1206 (corr. to 4 dec. pl.) (b.) (11) Ans = 7/200 = 0.035

[icyjuicycourt]

How comes the last question is addition and means you multiply please clarify sir

[mrluke]

And means multiplication mwalimu in part b ii

[EngineerSigeike]

The last part is wrong.and means multiply and you have divided the total by 100 instead of 200.

[frezyshazy]

The number of students in the school are 200 not 800 mwalimu

[Healthmatters]

Part b, there something wrong with 'and' and 'or'

[dr.tr.oscarngatia.W.O.laod]

My answers would be:
40/200 or 0.2
31/200
24/199
21/9950

[NaomiWangui-hw]

Number of students should be 200 not 800