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A bag contains beads, 60% of which are green. A student claims that the probability of getting two green beads if the beads aren't replaced is 1/3 as 6/10 * 5/9 is 1/3. Is the student right?

They have multiplied the fractions correctly but they are still incorrect. The student has assumed that a bag with 60% green beads contains 10 beads. If the bag had 100 beads and 60 were green, 60% of the be...
AK
Answered by Adithya K. • Maths tutor
4003 Views

Integrate ∫_(-1)^1 3/√(x+2) dx using the substitution u x+2

Step 1:Replace any obvious in the integral with the substitution u=x+2 ∫_(-1)^1 3/√u dx Step 2: Differentiate the substitution u=x+2 to find an expression for dx (to differentiate multiply by the power and t...
MY
Answered by Micaela Y. • Maths tutor
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What kind of effect would a national minimum wage have, is it positive or negative ?

A national minimum wage sets the minimum hourly wage rate that is acceptable by law. It is needed for a variety of reasons. It has several advantages including reducing poverty and reducing gap between rich ...
OO
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Define an exothermic reaction.

A reaction in which energy is released into the surroundings by the system.
BG
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Write (√(18)+10)/√(2) in the form: p + q√2 [4 marks]

First, simplify √18 by writing it as √(9x2) = √9 x √2 = 3√2. Then, rationalise the denominator by multiplying both top and bottom of the fraction by √2. This gives √2 x √2 = 2 in the denominator, and (3√2+10...
AC
Answered by Abby C. • Maths tutor
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