Je suis bloque sur cet exercice: Une urne contient 100 boules numérotées de 1 a 100. On preleve une boule au hasard.
On considére les evenements suivants :
A: le numéro de la boule est pair
B: le numéro est un multiple de 5
C: Le numéro est un multiple de 10
1.
Calculer les probabilités de
a) A, B, C,
b) À inter B
c) B inter C
d) A inter C barre

2.
En déduire la probabilité de A union B et A union C barre

Pour le 1, j ai trouvé
a) 1/2, 1/5, 1/10
b) 1/10
c) 1/10
Mais je ne sais pas comment faire le reste
Merci d avance​

no i do not : ( what is it?

solution:

we have to construct

∠m nt ≅ ∠p qr

the steps to draw this construction are

step 1: use a compass to draw an arc from point q which intersects the side pq at point a and the side qr at point b.

step 2: draw a segment nt and use the same width of the compass to draw an arc from point n which intersects the segment nt at a point x.

step 3:

step 4: join points n and y using a straightedge.

step 3:

option (d).maintaining the same width of the compass as ab, draw an arc from point x such that it intersects the arc drawn from n in a point y.

to draw   congruent angles , 1. width of compasses while drawing two angles should be same i.e from point at which angle has to be drawn, 2.the distance between the two points where the compass intersects the two sides should be same while drawing any two congruent angles.

do you have a picture of the table