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When working with probabilities why is it sometimes necessary to add and sometimes to multiply?

Whether you need to add or multiply depends on whether it is a case of 'AND' or 'OR'. For 'AND' you multiply, and for 'OR' you add. Below are examples of each case, using dice as an example: To calculate ...

MW
Answered by Marcus W. Maths tutor
3123 Views

When do you agree the past participle?

With verbs such as 'aller' and 'venir', the auxiliary verb is être and the past participle needs to agree with the subject.e.g. Il est allé à Paris. Elle est allée à Bruxelles.With most v...

OB
Answered by Oliver B. French tutor
2017 Views

Give 2 differences between an animal and a plant cell.

Any 2 from: Plant cells have; cell wall (1), large vacuole (1), chloroplast (1) Animals cells are more irregular in shape, plant cells are more rigid and rectangular (1)


SG
Answered by Sarina G. Biology tutor
2710 Views

Solve the simultaneous equations: y=x^2 + 3x + 7 and y=x + 10

x= -3 and 1y= 7 and 11

US
Answered by Usmaan S. Maths tutor
3418 Views

Explain, in terms of particles, why the rate decreases during the reaction between magnesium and hydrochloric acid.

There are 2 ideas that need to be included here :The concentration of acid decreases over time So collisions are less frequentAs the reaction proceeds more and more molecules would have collided successfu...

SM
10880 Views

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