If –2 and –5 are the roots of the equation ax + bx + 20 = 0, find the values of a and b.
2 answers:
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Answer:
(a) 1.8 eggs
(b) 0.52 eggs
Step-by-step explanation:
According to the problem, computation of the given data are as follows:
The mean number of broken eggs in a dozen E(X) = 0.6
Standard deviation SD(X) = 0.3
(a). For 3 dozen eggs, number of broken eggs can be calculated by using following formula,
E(X) for 3 dozen = 3 × 0.6
= 1.8 eggs
(b). Standard deviation for 3 dozen can be calculated as follows,
SD (X) = ×
=
= 0.52 eggs
Answer:
Step-by-step explanation:
1. the formula is: p=(number_of_numbered_cards)/(total_number_of_cards);
2. the number of total numbers of the cards is 52 (according to the condition); the number of the numbered cards is:
4*(10-2+1)=36 (min is '2'; max is '10').
3. after the substitution:
p=36/52=9/13≈0.692