exam Maths Puzzle Numerical Ability

Two dice are rolled 20 times. Compute Pe(13), the empirical probability of obtaining a score of 13. Explain the result very briefly.

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exam Other Question

if 1ST is one tile and 2nd is three tiles , 3rd is five tiles ,4th is seven tiles. write an equation for the number of tiles,t, needed to make the nth figure. Ron Wood can paint a room in 6 hr working alone. If his son, Jason, helps him, the job takes 4 hr. How long would it take Jason to do the job if he worked alone?