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  1. ... to overtake the lorry That is at 5 + 4 = 9, i.e. 9pm 2.) It takes 10 minutes from 1/15 of the rain gauge to the brim That is 10 minutes from (1/15) x...

    分類:科學及數學 > 數學 2008年08月29日

  2. ... the bag if there are 10 balls that are type A in it , and 2 balls that are type B are taken out of the bag?

    分類:科學及數學 > 數學 2007年12月13日

  3. 1i) Since 80 is 2 standard deviation away from the mean P(X>80)=P(Z>2)=0.02275. The students scored more than 80 = 400*0.02275=9 ii) P(X<40)=P(Z<2)=0.02275 2i) (5C4)(0.1)^4...

    分類:科學及數學 > 數學 2010年11月09日

  4. In Form 2, you will teach factorization. The methods of factorization usually has several ways to solve it : - Taking out common factor - a^2 - b^2 = (a+b)(a-b) - a^2 + 2ab + b^2 = (a+b)^2 - a^2 - 2ab...

    分類:科學及數學 > 數學 2009年10月11日

  5. ...and D, and either of them in any 1 floor out of the 3floors (3²).) No. of ways = ...54 ===== 2) (Choose 3 people (C(6,3)) to take 3 seats of the first row P(4,3...

    分類:科學及數學 > 數學 2012年06月08日

  6. ... can divide them but actually you may list out them, which is much faster. Q... written above, but I'm not sure whether it 's right or not, you may just take it as an example.

    分類:科學及數學 > 數學 2011年08月13日

  7. ...10368 Therefore the approximate value of 81^(1/3) ~= 4*11215/10368 =4.327 (to three... sure you would be capable to try it out as an exercise. If you have ...post what you have done and we will take it from there.

    分類:科學及數學 > 數學 2007年10月20日

  8. ...m(H2O):m(Na)=5:1 m(H2O)=5m(Na)=1mol. mass of H2O=(2+16)*1=18g. Assume there is 1mole of sodium ...

    分類:科學及數學 > 數學 2009年11月19日

  9. 1) Let t be the number of $2 coins, and f be that of $5 coins. 2t + 5f = 78 ...... (1) (t - 3... and 6 $5 coints. 2) Let a g and b g be the weight of grade A tea and that of grade B tea respectively. a + b = 1.8 x 1000...

    分類:科學及數學 > 數學 2010年01月15日

  10. ...5768 (b) This is a binomial dist. with n = 5 and p = 0.5768 P(2 out of 5 samples containing 3 or more bacteria) = (5C2...

    分類:科學及數學 > 數學 2011年10月25日