Results are out! Find what you need...fast. Get quick advice or join the chat
Hey there Sign in to join this conversationNew here? Join for free

two s2 questions

Announcements Posted on
Live webchat: Student Finance explained - on TSR from 2 - 3pm 17-09-2014
Got a question about Student Finance? Ask the experts this week on TSR! 14-09-2014
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    1. in the production of cd's at a factory, the proportion of faulty discs is known to be 1/5. each week 2000 discs are produced. estimate the prob that at most 349 faults discs are produced in one week. DONE this bit, got 0.0024

    it costs 60p to produce a CD. a faulty disc is discarded, a non-faulty one is sold for 9.00, find the profit of the factory per week. ans=£13 200

    2. a large bag of seed contains 3 varieties in the ratios 4:2:1, their germination rates are 50%, 60% and 80% respectively. show that 4/7 is the prob that a seed will germinate
    • 0 followers
    Offline

    ReputationRep:
    1. Cost = 0.6x2000=1200
    Revenue=(4/5)x2000x9=14400
    Profit=14400-1200=13200
    2. (4/7).(0.5) + (2/7).(0.6) + (1/7).(0.8) = 4/7
Updated: February 5, 2005
New on TSR

Writing your personal statement

Our free PS builder tool makes it easy

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.